David J. Weiss | California State University, Los Angeles (original) (raw)
Papers by David J. Weiss
Objectives To evaluate if the US governors decision to issue the stay-at-home orders reflects the... more Objectives To evaluate if the US governors decision to issue the stay-at-home orders reflects the classic Weber-Fechner law of psychophysics, the amount by which a stimulus (such as number of cases or deaths) must increase in order to be noticed-the just noticeable difference- as a fraction of the intensity of that stimulus. Design A prospective observational study using data on the daily number of infected patients and deaths from the New York Times daily database. Setting 50 States and the District of Columbia Participants All individuals judged to be positive for the coronavirus or to have died from COVID19. Main outcome measures Number of people diagnosed with or died from COVID19. Results We found that the decision to issue the state-at-home order reflects the Weber-Fechner law of psychophysics. Both the number of infections (p=<0.0001; R2=0.79) and deaths (p<0.0001; R2=0.63) were highly statistically significantly associated with the decision to issue the stay-at-home or...
Studies in History and Philosophy of Science, Dec 1, 2021
We have each spent more than 50 years doing research that has had little impact. Even more lament... more We have each spent more than 50 years doing research that has had little impact. Even more lamentable is that our field, judgment and decision making (JDM), has on the whole had little impact during that span. We attribute that failure to the use of methodologies that emphasize testing models rather than looking for differences in behavior. The "cognitive revolution" led the field astray, toward the goal of studying model fit rather than comparing observable results. With modeling as the goal, experimentation was stultified. Simple tasks became dominant. Although a poor metaphor for real decision making, the gambling paradigm has lasted forever because the inputs to the decision are known to the researcher and thus easily modeled.
Universitas Psychologica, 2016
Se realizaron dos experimentos bi-nacionales con respecto a las respuestas emocionales y conductu... more Se realizaron dos experimentos bi-nacionales con respecto a las respuestas emocionales y conductuales a un plan terrorista contra vuelos comerciales, examinando ambas cosas: sentimientos y proyectos de accion. Los estudios emplearon escenarios hipoteticos en los que los terroristas atacaron los aviones con misiles disparados desde el hombro, ya que estaban aterrizando o despegando desde un aeropuerto internacional. Los escenarios fueron construidos alrededor de dos variables factoriales cruzadas, cada uno con tres niveles: (1) los anuncios o acciones del gobierno (2) norma social, expresada como la variacion en la venta de billetes de avion. Cada encuestado leyo un cuestionario que contenia solo uno de los nueve escenarios. El experimento 1 se realizo en Espana y California (n = 360, 50% mujeres), el experimento 2 en Israel y California (n = 504, 50% mujeres). En ambos estudios, el miedo y los planes de vuelo no fueron diferencialmente afectados por la respuesta gubernamental o la n...
A Science of Decision Making, 2008
Most of the decisions we make are not momentous. Should I have that cigarette now, go to class to... more Most of the decisions we make are not momentous. Should I have that cigarette now, go to class today, go through that yellow traffic light? Our theoretical stance is that all decisions involve an attempt to maximize utility. We need to explain how such everyday decisions are made easily, without a conscious sense of weighing options. We define a policy decision as one that dictates a way of handling the smaller decisions that it governs. I might have made a policy decision to avoid a certain kind of food or drug. When that food or drug is offered, I don't have to think much before rejecting it. People do violate their policies, either deliberatively or impulsively. Occasionally, I do eat that tempting piece of Black Forest cake. The violation is a lapse. Enough occasional lapses, and the policy collapses.
Psicologica, 2010
Functional measurement studies typically collect numerical data in order to study judgment. The n... more Functional measurement studies typically collect numerical data in order to study judgment. The new Nanova (Nominal analysis of “variance”) method allows for expansion of the paradigm to include the study of actual or projected behavior. In everyday life, people carry out actions that can be described using verbal labels, which are nominal data. Nanova is similar to analysis of variance in that significance statements assess the effect of experimentally manipulated factors. The way the methodology can extract cognitive strategies from behavioral actions is illustrated by considering a hypothetical burglar who attends to two safety features of the target homes under consideration. A real illustration is also presented, in which respondents reported both fear and projected actions in response to scenarios describing terrorist attacks. The emotional responses, reported as numbers, were analyzed with analysis of variance. The projected actions, reported nominally, were analyzed with the...
Brazilian Journal of Oral Sciences, 2003
Over the past several decades, evidence based health care, and evidence based dentistry in partic... more Over the past several decades, evidence based health care, and evidence based dentistry in particular, has come to be seen as the proper foundation for selecting a treatment program. Evidence based dentistry can be defined as the process of systematically evaluating the research evidence to determine the best treatment in everyday clinical practice. Integration of research evidence into practice relies on the ability of dentists to identify appropriately designed and conducted research, whose results have been correctly analyzed. However, questions arise as to the relevance of the published research to individual clinical needs, particularly in situations when either the published evidence is mixed or it cannot be translated into the present needs of the clinician. An algorithm is needed that is designed to aid the clinician in selectively reviewing the evidence and determining its applicability.
Theory and Decision, 2009
We propose a descriptive version of the classical multi-attribute utility model; to that end, we ... more We propose a descriptive version of the classical multi-attribute utility model; to that end, we add a new parameter, momentary salience, to the customary formulation. The addition of this parameter allows the theory to accommodate changes in the decision maker's mood and circumstances, as the saliencies of anticipated consequences are driven by concerns of the moment. By allowing for the number of consequences given attention at the moment of decision to vary, the new model mutes the criticism that SEU models call for an omniscient decision maker. Use of the model is illustrated with a large-scale longitudinal study showing that adolescent smokers have higher utility for smoking than nonsmokers. We also propose to use the model hierarchically to describe everyday decisions that people deal with repeatedly. Big decisions, which set policy, guide a host of nested little decisions, which in turn lead Ward Edwards died in 2005. Although this manuscript was written several years after his passing, he participated in the development of several of the key ideas, especially the notion of option packaging. The new parameter, momentary salience, was introduced to resolve the disconnect between laboratory studies of decision making, in which the options and their consequences are fully laid out before the subject, and everyday decisions, in which the decision maker usually has to determine what the reasonable options are before choosing among them. For further discussion of our collaborative efforts, see the introductions in Weiss and Weiss (2009).
Behavior Research Methods, 2009
Nominal responses are the natural way for people to report actions or opinions. Because nominal r... more Nominal responses are the natural way for people to report actions or opinions. Because nominal responses do not generate numerical data, they have been underutilized in behavioral research. On those occasions in which nominal responses are elicited, the responses are customarily aggregated over people or trials so that large-sample statistics can be employed. A new analysis is proposed that directly associates differences among responses with particular sources in factorial designs. A pair of nominal responses either matches or does not; when responses do not match, they vary. That analogue to variance is incorporated in the nominal analysis of "variance" (NANOVA) procedure, wherein the proportions of matches associated with sources play the same role as do sums of squares in an ANOVA. The NANOVA table is structured like an ANOVA table. The significance levels of the N ratios formed by comparing proportions are determined by resampling. Fictitious behavioral examples featuring independent groups and repeated measures designs are presented. A Windows program for the analysis is available.
Teorie e Modelli, 2007
Evaluating the individual performances of those who comprise a team is complicated by the fact th... more Evaluating the individual performances of those who comprise a team is complicated by the fact that members have different responsibilities. A shooting guard in basketball is likely to score more points than a point guard, and a first baseman in baseball is likely to commit fewer errors than a shortstop, because their opportunities differ in both quantity and quality. These examples illustrate the difficulty in identifying effective team members merely by considering individual performance statistics. If a team fails to accomplish its goals, it is ...
Journal of Counseling & Development, 2012
Journal of Management & Organization, 2012
When seeking help or advice, one naturally wishes to get that aid from someone who does the task ... more When seeking help or advice, one naturally wishes to get that aid from someone who does the task well, from an expert. Determining whether someone merits that label is not trivial, and the judgment can have important consequences. Experts in most domains, from athletes to plumbers, need to exhibit a high level of performance to maintain their status. But there is another group of professionals that is never examined. The expert status of such experts is conferred via criteria such as education or experience. While their credentials may be challenged, their work itself is not seen to bear upon their status. We refer to this group as privileged experts. These experts make assessments or predictions whose correctness is rarely evaluated. Even if prophecy fails, errors are forgiven. We account for this non-evidentiary perspective by positing a widely-held misconception that expertise generalizes. We outline a task-specific, performance-based, limited-term certification scheme that can s...
Using a cognitive task (mental calculation) and a perceptual-motor task (stylized golf putting), ... more Using a cognitive task (mental calculation) and a perceptual-motor task (stylized golf putting), we examined differential proficiency using the CWS index and several other quantitative measures of performance. The CWS index (Weiss & Shanteau, 2003) is a coherence criterion that looks only at internal properties of the data without incorporating an external standard. In Experiment 1, college students (n = 20) carried out 2- and 3-digit addition and multiplication problems under time pressure. In Experiment 2, experienced golfers (n = 12), also college students, putted toward a target from nine different locations. Within each experiment, we analyzed the same responses using different methods. For the arithmetic tasks, accuracy information (mean absolute deviation from the correct answer, MAD) using a coherence criterion was available; for golf, accuracy information using a correspondence criterion (mean deviation from the target, also MAD) was available. We ranked the performances of...
Behavioral and Brain Sciences
Despite claims of pure pragmatism, Hertwig and Ortmann's negative perspective on deception su... more Despite claims of pure pragmatism, Hertwig and Ortmann's negative perspective on deception suggests a selfish psychologist willing to sacrifice the reputation of the discipline in order to expedite the research. Although questions that appear to have correct answers may be investigated with complete openness, research that delves into personal secrets often requires deception as a tool to counter self-presentation bias.
Educational and Psychological Measurement, 1987
Abstract 1. Describes SNAPSHOT, a computer program that analyzes 1, 2, or 3 treatment factors in ... more Abstract 1. Describes SNAPSHOT, a computer program that analyzes 1, 2, or 3 treatment factors in situations when there are unequal numbers of scores from Ss. SNAPSHOT computes an F-ratio for each factor as well as for the interaction among them. A case example of a 2-treatment factor illustrates how SNAPSHOT is used. The program is written in BASIC for Apple IIe computers.(PsycINFO Database Record (c) 2010 APA, all rights reserved)
Psicologica International Journal of Methodology and Experimental Psychology, 2010
Functional measurement studies typically collect numerical data in order to study judgment. The n... more Functional measurement studies typically collect numerical data in order to study judgment. The new Nanova (Nominal analysis of "variance") method allows for expansion of the paradigm to include the study of actual or projected behavior. In everyday life, people carry out actions that can be described using verbal labels, which are nominal data. Nanova is similar to analysis of variance in that significance statements assess the effect of experimentally manipulated factors. The way the methodology can extract cognitive strategies from behavioral actions is illustrated by considering a hypothetical burglar who attends to two safety features of the target homes under consideration. A real illustration is also presented, in which respondents reported both fear and projected actions in response to scenarios describing terrorist attacks. The emotional responses, reported as numbers, were analyzed with analysis of variance. The projected actions, reported nominally, were analyzed with the NANOVA computer program (Weiss, 2009). Two factors embedded in the scenarios, government announcement and public reaction, yielded similar effects on both kinds of response. Neither main effect was significant, nor were the anticipated effects of the variables obtained. With both response modes, the factors interacted significantly.
Psicologica International Journal of Methodology and Experimental Psychology, 2012
Abstract Policies that call for members of the public to change their behavior fail if people don... more Abstract Policies that call for members of the public to change their behavior fail if people don&#x27;t change; predictions of whether the requisite changes will take place are needed prior to implementation. I propose to solve the prediction problem with Factorial Forecasting, a version of functional measurement methodology that employs group designs. Aspects of the proposed new policy are factorially manipulated within scenarios, and respondents typical of those whose behavior would need to change are asked to project how they would react. ...
Psychol Bull, 1972
Abstract 1. 8 paid Ss estimated average value of angle pairs using magnitude estimations or graph... more Abstract 1. 8 paid Ss estimated average value of angle pairs using magnitude estimations or graphic ratings. These numerical response data followed a simple averaging model. Functional scaling yielded a linear relation between subjective and objective angle. The numerical data were then reduced to rank orders, and JB Kruskal&amp;amp;#x27;s monotone analysis of variance (MONANOVA) procedure was applied. This allowed a reconstruction of the original metric information from the strictly ordinal information, illustrating the power of ...
Http Dx Doi Org 10 1300 J082v37n04_05, Oct 12, 2008
The purpose of this study was to assess attitudes of enlisted military personnel with regard to h... more The purpose of this study was to assess attitudes of enlisted military personnel with regard to homosexuality. Seventy-two male members of the Marine Corps Reserve responded to a questionnaire exploring attitudes toward lesbians and gay men and attitudes toward homosexuals in the military. Results showed that attitudes with respect to these topics were mildly unfavorable. In addition, several predictor variables employed in similar studies with civilians were examined. Correlational evidence showed that participants expressing more negative attitudes tended to have more conservative political ideology, reported more religious attendance, and were more likely to have had no contact with a gay or lesbian person than those expressing less negative attitudes. These findings suggest that the attitudes held by enlisted personnel are similar to those of their civilian counterparts.
Objectives To evaluate if the US governors decision to issue the stay-at-home orders reflects the... more Objectives To evaluate if the US governors decision to issue the stay-at-home orders reflects the classic Weber-Fechner law of psychophysics, the amount by which a stimulus (such as number of cases or deaths) must increase in order to be noticed-the just noticeable difference- as a fraction of the intensity of that stimulus. Design A prospective observational study using data on the daily number of infected patients and deaths from the New York Times daily database. Setting 50 States and the District of Columbia Participants All individuals judged to be positive for the coronavirus or to have died from COVID19. Main outcome measures Number of people diagnosed with or died from COVID19. Results We found that the decision to issue the state-at-home order reflects the Weber-Fechner law of psychophysics. Both the number of infections (p=<0.0001; R2=0.79) and deaths (p<0.0001; R2=0.63) were highly statistically significantly associated with the decision to issue the stay-at-home or...
Studies in History and Philosophy of Science, Dec 1, 2021
We have each spent more than 50 years doing research that has had little impact. Even more lament... more We have each spent more than 50 years doing research that has had little impact. Even more lamentable is that our field, judgment and decision making (JDM), has on the whole had little impact during that span. We attribute that failure to the use of methodologies that emphasize testing models rather than looking for differences in behavior. The "cognitive revolution" led the field astray, toward the goal of studying model fit rather than comparing observable results. With modeling as the goal, experimentation was stultified. Simple tasks became dominant. Although a poor metaphor for real decision making, the gambling paradigm has lasted forever because the inputs to the decision are known to the researcher and thus easily modeled.
Universitas Psychologica, 2016
Se realizaron dos experimentos bi-nacionales con respecto a las respuestas emocionales y conductu... more Se realizaron dos experimentos bi-nacionales con respecto a las respuestas emocionales y conductuales a un plan terrorista contra vuelos comerciales, examinando ambas cosas: sentimientos y proyectos de accion. Los estudios emplearon escenarios hipoteticos en los que los terroristas atacaron los aviones con misiles disparados desde el hombro, ya que estaban aterrizando o despegando desde un aeropuerto internacional. Los escenarios fueron construidos alrededor de dos variables factoriales cruzadas, cada uno con tres niveles: (1) los anuncios o acciones del gobierno (2) norma social, expresada como la variacion en la venta de billetes de avion. Cada encuestado leyo un cuestionario que contenia solo uno de los nueve escenarios. El experimento 1 se realizo en Espana y California (n = 360, 50% mujeres), el experimento 2 en Israel y California (n = 504, 50% mujeres). En ambos estudios, el miedo y los planes de vuelo no fueron diferencialmente afectados por la respuesta gubernamental o la n...
A Science of Decision Making, 2008
Most of the decisions we make are not momentous. Should I have that cigarette now, go to class to... more Most of the decisions we make are not momentous. Should I have that cigarette now, go to class today, go through that yellow traffic light? Our theoretical stance is that all decisions involve an attempt to maximize utility. We need to explain how such everyday decisions are made easily, without a conscious sense of weighing options. We define a policy decision as one that dictates a way of handling the smaller decisions that it governs. I might have made a policy decision to avoid a certain kind of food or drug. When that food or drug is offered, I don't have to think much before rejecting it. People do violate their policies, either deliberatively or impulsively. Occasionally, I do eat that tempting piece of Black Forest cake. The violation is a lapse. Enough occasional lapses, and the policy collapses.
Psicologica, 2010
Functional measurement studies typically collect numerical data in order to study judgment. The n... more Functional measurement studies typically collect numerical data in order to study judgment. The new Nanova (Nominal analysis of “variance”) method allows for expansion of the paradigm to include the study of actual or projected behavior. In everyday life, people carry out actions that can be described using verbal labels, which are nominal data. Nanova is similar to analysis of variance in that significance statements assess the effect of experimentally manipulated factors. The way the methodology can extract cognitive strategies from behavioral actions is illustrated by considering a hypothetical burglar who attends to two safety features of the target homes under consideration. A real illustration is also presented, in which respondents reported both fear and projected actions in response to scenarios describing terrorist attacks. The emotional responses, reported as numbers, were analyzed with analysis of variance. The projected actions, reported nominally, were analyzed with the...
Brazilian Journal of Oral Sciences, 2003
Over the past several decades, evidence based health care, and evidence based dentistry in partic... more Over the past several decades, evidence based health care, and evidence based dentistry in particular, has come to be seen as the proper foundation for selecting a treatment program. Evidence based dentistry can be defined as the process of systematically evaluating the research evidence to determine the best treatment in everyday clinical practice. Integration of research evidence into practice relies on the ability of dentists to identify appropriately designed and conducted research, whose results have been correctly analyzed. However, questions arise as to the relevance of the published research to individual clinical needs, particularly in situations when either the published evidence is mixed or it cannot be translated into the present needs of the clinician. An algorithm is needed that is designed to aid the clinician in selectively reviewing the evidence and determining its applicability.
Theory and Decision, 2009
We propose a descriptive version of the classical multi-attribute utility model; to that end, we ... more We propose a descriptive version of the classical multi-attribute utility model; to that end, we add a new parameter, momentary salience, to the customary formulation. The addition of this parameter allows the theory to accommodate changes in the decision maker's mood and circumstances, as the saliencies of anticipated consequences are driven by concerns of the moment. By allowing for the number of consequences given attention at the moment of decision to vary, the new model mutes the criticism that SEU models call for an omniscient decision maker. Use of the model is illustrated with a large-scale longitudinal study showing that adolescent smokers have higher utility for smoking than nonsmokers. We also propose to use the model hierarchically to describe everyday decisions that people deal with repeatedly. Big decisions, which set policy, guide a host of nested little decisions, which in turn lead Ward Edwards died in 2005. Although this manuscript was written several years after his passing, he participated in the development of several of the key ideas, especially the notion of option packaging. The new parameter, momentary salience, was introduced to resolve the disconnect between laboratory studies of decision making, in which the options and their consequences are fully laid out before the subject, and everyday decisions, in which the decision maker usually has to determine what the reasonable options are before choosing among them. For further discussion of our collaborative efforts, see the introductions in Weiss and Weiss (2009).
Behavior Research Methods, 2009
Nominal responses are the natural way for people to report actions or opinions. Because nominal r... more Nominal responses are the natural way for people to report actions or opinions. Because nominal responses do not generate numerical data, they have been underutilized in behavioral research. On those occasions in which nominal responses are elicited, the responses are customarily aggregated over people or trials so that large-sample statistics can be employed. A new analysis is proposed that directly associates differences among responses with particular sources in factorial designs. A pair of nominal responses either matches or does not; when responses do not match, they vary. That analogue to variance is incorporated in the nominal analysis of "variance" (NANOVA) procedure, wherein the proportions of matches associated with sources play the same role as do sums of squares in an ANOVA. The NANOVA table is structured like an ANOVA table. The significance levels of the N ratios formed by comparing proportions are determined by resampling. Fictitious behavioral examples featuring independent groups and repeated measures designs are presented. A Windows program for the analysis is available.
Teorie e Modelli, 2007
Evaluating the individual performances of those who comprise a team is complicated by the fact th... more Evaluating the individual performances of those who comprise a team is complicated by the fact that members have different responsibilities. A shooting guard in basketball is likely to score more points than a point guard, and a first baseman in baseball is likely to commit fewer errors than a shortstop, because their opportunities differ in both quantity and quality. These examples illustrate the difficulty in identifying effective team members merely by considering individual performance statistics. If a team fails to accomplish its goals, it is ...
Journal of Counseling & Development, 2012
Journal of Management & Organization, 2012
When seeking help or advice, one naturally wishes to get that aid from someone who does the task ... more When seeking help or advice, one naturally wishes to get that aid from someone who does the task well, from an expert. Determining whether someone merits that label is not trivial, and the judgment can have important consequences. Experts in most domains, from athletes to plumbers, need to exhibit a high level of performance to maintain their status. But there is another group of professionals that is never examined. The expert status of such experts is conferred via criteria such as education or experience. While their credentials may be challenged, their work itself is not seen to bear upon their status. We refer to this group as privileged experts. These experts make assessments or predictions whose correctness is rarely evaluated. Even if prophecy fails, errors are forgiven. We account for this non-evidentiary perspective by positing a widely-held misconception that expertise generalizes. We outline a task-specific, performance-based, limited-term certification scheme that can s...
Using a cognitive task (mental calculation) and a perceptual-motor task (stylized golf putting), ... more Using a cognitive task (mental calculation) and a perceptual-motor task (stylized golf putting), we examined differential proficiency using the CWS index and several other quantitative measures of performance. The CWS index (Weiss & Shanteau, 2003) is a coherence criterion that looks only at internal properties of the data without incorporating an external standard. In Experiment 1, college students (n = 20) carried out 2- and 3-digit addition and multiplication problems under time pressure. In Experiment 2, experienced golfers (n = 12), also college students, putted toward a target from nine different locations. Within each experiment, we analyzed the same responses using different methods. For the arithmetic tasks, accuracy information (mean absolute deviation from the correct answer, MAD) using a coherence criterion was available; for golf, accuracy information using a correspondence criterion (mean deviation from the target, also MAD) was available. We ranked the performances of...
Behavioral and Brain Sciences
Despite claims of pure pragmatism, Hertwig and Ortmann's negative perspective on deception su... more Despite claims of pure pragmatism, Hertwig and Ortmann's negative perspective on deception suggests a selfish psychologist willing to sacrifice the reputation of the discipline in order to expedite the research. Although questions that appear to have correct answers may be investigated with complete openness, research that delves into personal secrets often requires deception as a tool to counter self-presentation bias.
Educational and Psychological Measurement, 1987
Abstract 1. Describes SNAPSHOT, a computer program that analyzes 1, 2, or 3 treatment factors in ... more Abstract 1. Describes SNAPSHOT, a computer program that analyzes 1, 2, or 3 treatment factors in situations when there are unequal numbers of scores from Ss. SNAPSHOT computes an F-ratio for each factor as well as for the interaction among them. A case example of a 2-treatment factor illustrates how SNAPSHOT is used. The program is written in BASIC for Apple IIe computers.(PsycINFO Database Record (c) 2010 APA, all rights reserved)
Psicologica International Journal of Methodology and Experimental Psychology, 2010
Functional measurement studies typically collect numerical data in order to study judgment. The n... more Functional measurement studies typically collect numerical data in order to study judgment. The new Nanova (Nominal analysis of "variance") method allows for expansion of the paradigm to include the study of actual or projected behavior. In everyday life, people carry out actions that can be described using verbal labels, which are nominal data. Nanova is similar to analysis of variance in that significance statements assess the effect of experimentally manipulated factors. The way the methodology can extract cognitive strategies from behavioral actions is illustrated by considering a hypothetical burglar who attends to two safety features of the target homes under consideration. A real illustration is also presented, in which respondents reported both fear and projected actions in response to scenarios describing terrorist attacks. The emotional responses, reported as numbers, were analyzed with analysis of variance. The projected actions, reported nominally, were analyzed with the NANOVA computer program (Weiss, 2009). Two factors embedded in the scenarios, government announcement and public reaction, yielded similar effects on both kinds of response. Neither main effect was significant, nor were the anticipated effects of the variables obtained. With both response modes, the factors interacted significantly.
Psicologica International Journal of Methodology and Experimental Psychology, 2012
Abstract Policies that call for members of the public to change their behavior fail if people don... more Abstract Policies that call for members of the public to change their behavior fail if people don&#x27;t change; predictions of whether the requisite changes will take place are needed prior to implementation. I propose to solve the prediction problem with Factorial Forecasting, a version of functional measurement methodology that employs group designs. Aspects of the proposed new policy are factorially manipulated within scenarios, and respondents typical of those whose behavior would need to change are asked to project how they would react. ...
Psychol Bull, 1972
Abstract 1. 8 paid Ss estimated average value of angle pairs using magnitude estimations or graph... more Abstract 1. 8 paid Ss estimated average value of angle pairs using magnitude estimations or graphic ratings. These numerical response data followed a simple averaging model. Functional scaling yielded a linear relation between subjective and objective angle. The numerical data were then reduced to rank orders, and JB Kruskal&amp;amp;#x27;s monotone analysis of variance (MONANOVA) procedure was applied. This allowed a reconstruction of the original metric information from the strictly ordinal information, illustrating the power of ...
Http Dx Doi Org 10 1300 J082v37n04_05, Oct 12, 2008
The purpose of this study was to assess attitudes of enlisted military personnel with regard to h... more The purpose of this study was to assess attitudes of enlisted military personnel with regard to homosexuality. Seventy-two male members of the Marine Corps Reserve responded to a questionnaire exploring attitudes toward lesbians and gay men and attitudes toward homosexuals in the military. Results showed that attitudes with respect to these topics were mildly unfavorable. In addition, several predictor variables employed in similar studies with civilians were examined. Correlational evidence showed that participants expressing more negative attitudes tended to have more conservative political ideology, reported more religious attendance, and were more likely to have had no contact with a gay or lesbian person than those expressing less negative attitudes. These findings suggest that the attitudes held by enlisted personnel are similar to those of their civilian counterparts.
Often a researcher is interested in comparing the expertise of groups that differ in some systema... more Often a researcher is interested in comparing the expertise of groups that differ in some systematic way. The collective expertise shown by a group is determined by aggregating CWS over the individual members. For CWS ratios, the appropriate average is the square root of the sum of the squared individual CWSs (see Weiss & Edwards (2005) for discussion of why calculation ought to be carried out on square roots with the result then squared to return to CWS units). It is not uncommon to observe sizable differences among individuals who share a common label that purportedly describes their level of expertise. Statistical comparisons across groups ought to take this variability into account. A simple way to accomplish this goal is to test for overlapping confidence intervals. According to Payton, Greenstone, and Schenker (2003), constructing 84.3% confidence intervals around two sample means (or for CWS scores, the square root of the sum of the squared CWSs) provides a test that yields a Type I error rate of 5%. The formula is CI = mean CWS F 0 B 1 t F 0 B 7 s. When the 38 experienced therapists were compared (on a group basis) to the 37 students prior to training, a surprising result obtained. The mean CWS for the students, 7.10, was higher than that for the experienced group, 6.33. Calculations are carried out on the square root of each of the individual CWSs within the group. The mean of the square roots is then squared to yield the group mean. The standard error of the mean for each group, s, is also calculated using the square roots. The t value depends on the significance