Steven J Frenda | California State University, Los Angeles (original) (raw)
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Papers by Steven J Frenda
Psychological Science, 2014
Proceedings of the National Academy of Sciences, 2013
Many studies have investigated factors that affect susceptibility to false memories. However, few... more Many studies have investigated factors that affect susceptibility to false memories. However, few have investigated the role of sleep deprivation in the formation of false memories, despite overwhelming evidence that sleep deprivation impairs cognitive function. We examined the relationship between self-reported sleep duration and false memories and the effect of 24 hr of total sleep deprivation on susceptibility to false memories. We found that under certain conditions, sleep deprivation can increase the risk of developing false memories. Specifically, sleep deprivation increased false memories in a misinformation task when participants were sleep deprived during event encoding, but did not have a significant effect when the deprivation occurred after event encoding. These experiments are the first to investigate the effect of sleep deprivation on susceptibility to false memories, which can have dire consequences.
In the largest false memory study to date, 5,269 participants were asked about their memories for... more In the largest false memory study to date, 5,269 participants were asked about their memories for three true and one of five fabricated political events. Each fabricated event was accompanied by a photographic image purportedly depicting that event. Approximately half the participants falsely remembered that the false event happened, with 27% remembering that they saw the events happen on the news. Political orientation appeared to influence the formation of false memories, with conservatives more likely to falsely remember seeing Barack Obama shaking hands with the president of Iran, and liberals more likely to remember George W. Bush vacationing with a baseball celebrity during the Hurricane Katrina disaster. A follow-up study supported the explanation that events are more easily implanted in memory when they are congruent with a person's preexisting attitudes and evaluations, in part because attitude-congruent false events pro- mote feelings of recognition and familiarity, which in turn interfere with source attributions.
Current Directions in Psychological Science, Jan 1, 2011
Eyewitnesses are often called upon to report information about what they have seen. A wealth of r... more Eyewitnesses are often called upon to report information about what they have seen. A wealth of research from the past century has demonstrated, however, that eyewitness memory is malleable and vulnerable to distorting influences, including the effects of misinformation. In this article, we review recent developments in research related to the misinformation effect, including individual differences in susceptibility, neuroimaging approaches, and protective interview procedures that may better elicit accurate event details. We conclude with a section on related false memory research.
The American journal of …, Jan 1, 2010
Cross-sectional studies have reported inverse associations of B-type natriuretic peptide (BNP) wi... more Cross-sectional studies have reported inverse associations of B-type natriuretic peptide (BNP) with the body mass index (BMI). We evaluated whether changes in the BMI are associated with changes in BNP. A nested prospective cohort study of a lifestyle intervention (low-fat, whole-foods diet, exercise, stress management, and social support) was conducted. BNP, BMI, and other biomarkers were measured at baseline and 3 months. A total of 131 subjects, 56 with coronary heart disease (CHD) and 75 at high risk, with > or =3 CHD risk factors and/or diabetes mellitus, were enrolled. At 3 months, the mean BMI had decreased (34.4 to 31.7 kg/m(2), p <0.001), BNP had increased (median 18 to 28 pg/ml, p <0.001), and low-density lipoprotein, C-reactive protein, apolipoprotein B (all p <0.002), and angina frequency (p = 0.017) and severity (p = 0.052) had decreased. The subjects' physical limitations had decreased and their physical functioning had improved (all p <0.001). The percentage of change in BNP was inversely associated with the percentage of change in insulin (r = -0.339, p = 0.005, n = 63 nondiabetics). It was also inversely associated with the percentage of change in BMI (r = -0.28, p = 0.002, n = 116), and this association remained significant (p = 0.029) in multiple regression analyses controlling for age, gender, CHD, diabetes mellitus, percentage of change in lifestyle index, and beta-blocker use. The metabolic changes related to adipose tissue lipolysis could explain these findings. In conclusion, BNP increased in subjects experiencing weight loss while following a lifestyle intervention, and angina pectoris, physical limitations, and other CHD risk factors decreased. Therefore, in this context, increasing BNP might not indicate worsening disease or a worsening prognosis. Thus, the proposed use of BNP in monitoring disease progression should take into account changes in the BMI during the same period.
![Research paper thumbnail of Pischke, C. R., Frenda, S. J., Ornish, D., Weidner, G. Lifestyle changes are related to reductions in depression in persons with elevated coronary risk factors. Psychology & Health 2010 Jun 29:1-24. [Epub ahead of print].](https://attachments.academia-assets.com/3249895/thumbnails/1.jpg)
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…, Jan 1, 2008
Journal of …, Jan 1, 2007
The Journal of …, Jan 1, 2008
To investigate the model of pedophilia as a disorder of addictive behavior, pedophiles and chemic... more To investigate the model of pedophilia as a disorder of addictive behavior, pedophiles and chemically addicted individuals were compared on personality traits potentially associated with impaired behavioral inhibition. Twenty-nine pedophiles, 25 opiate addicts (OA's), and 27 healthy controls were administered the Barratt Impulsivity Scale, Hare Psychopathy Checklist-Revised (PCL-R), and Structured Clinical Interview for DSM-V for Axis-II. OA's scored higher than either pedophiles or controls on the Barratt. Pedophiles and OA's scored higher than controls on all 3 Psychopathy Checklist-Revised scores but OA's scored marginally higher than pedophiles on factor 2 (behavioral) and total scores. On Structured Clinical Interview for DSM-V for Axis-II, pedophiles scored higher than controls on paranoid and schizoid scores whereas OA's did so on paranoid scores. Thus, both pedophiles and OA's may have elevated psychopathic traits and propensity toward cognitive distortions, as reflected in cluster A traits. Such similarities support the conceptualization of pedophilia as a behavioral addiction. Pedophiles may be less impulsive than OA's, however, and more prone toward cognitive distortions.
Journal of …, Jan 1, 2010
Journal of …, Jan 1, 2010
Given the recent interest in the concept of sexual addictions, it is instructive to study subject... more Given the recent interest in the concept of sexual addictions, it is instructive to study subjects with pedophilia alongside chemically addicted individuals and non-addicted controls in order to help identify which factors may determine the objects of people's respective addictions, as well as any factors that may predispose people to developing an addictive disorder. In this study, we considered whether childhood sexual abuse (CSA) is a specific risk factor for pedophilia as opposed to other types of addictive disorders by comparing the childhood sexual histories of 48 pedophilic sex offenders, 25 subjects with opiate addiction in remission, and 61 healthy controls. CSA was assessed with The Sexual History Questionnaire and the Child Trauma Questionnaire (CTQ). Compared with both opiate addicted subjects and healthy controls, subjects with pedophilia were more likely to report experiencing adult sexual advances when they were children and a first sexual contact by age 13 with a partner at least 5 years older. Although both subjects with pedophilia and those with opiate addiction first had sex at a younger age than healthy controls, opiate addicted subjects, compared with healthy controls, reported neither increased reception of sexual advances as children nor increased rates of first sexual contact before age 13 with a partner at least 5 years older. Further, subjects with pedophilia but not those with opiate addiction scored significantly higher than healthy controls on the CTQ. Sexual abuse in childhood may be a specific risk factor for sexual addictions such as pedophilia but may not be a specific risk factor for chemical addictions.
Psychological Science, 2014
Proceedings of the National Academy of Sciences, 2013
Many studies have investigated factors that affect susceptibility to false memories. However, few... more Many studies have investigated factors that affect susceptibility to false memories. However, few have investigated the role of sleep deprivation in the formation of false memories, despite overwhelming evidence that sleep deprivation impairs cognitive function. We examined the relationship between self-reported sleep duration and false memories and the effect of 24 hr of total sleep deprivation on susceptibility to false memories. We found that under certain conditions, sleep deprivation can increase the risk of developing false memories. Specifically, sleep deprivation increased false memories in a misinformation task when participants were sleep deprived during event encoding, but did not have a significant effect when the deprivation occurred after event encoding. These experiments are the first to investigate the effect of sleep deprivation on susceptibility to false memories, which can have dire consequences.
In the largest false memory study to date, 5,269 participants were asked about their memories for... more In the largest false memory study to date, 5,269 participants were asked about their memories for three true and one of five fabricated political events. Each fabricated event was accompanied by a photographic image purportedly depicting that event. Approximately half the participants falsely remembered that the false event happened, with 27% remembering that they saw the events happen on the news. Political orientation appeared to influence the formation of false memories, with conservatives more likely to falsely remember seeing Barack Obama shaking hands with the president of Iran, and liberals more likely to remember George W. Bush vacationing with a baseball celebrity during the Hurricane Katrina disaster. A follow-up study supported the explanation that events are more easily implanted in memory when they are congruent with a person's preexisting attitudes and evaluations, in part because attitude-congruent false events pro- mote feelings of recognition and familiarity, which in turn interfere with source attributions.
Current Directions in Psychological Science, Jan 1, 2011
Eyewitnesses are often called upon to report information about what they have seen. A wealth of r... more Eyewitnesses are often called upon to report information about what they have seen. A wealth of research from the past century has demonstrated, however, that eyewitness memory is malleable and vulnerable to distorting influences, including the effects of misinformation. In this article, we review recent developments in research related to the misinformation effect, including individual differences in susceptibility, neuroimaging approaches, and protective interview procedures that may better elicit accurate event details. We conclude with a section on related false memory research.
The American journal of …, Jan 1, 2010
Cross-sectional studies have reported inverse associations of B-type natriuretic peptide (BNP) wi... more Cross-sectional studies have reported inverse associations of B-type natriuretic peptide (BNP) with the body mass index (BMI). We evaluated whether changes in the BMI are associated with changes in BNP. A nested prospective cohort study of a lifestyle intervention (low-fat, whole-foods diet, exercise, stress management, and social support) was conducted. BNP, BMI, and other biomarkers were measured at baseline and 3 months. A total of 131 subjects, 56 with coronary heart disease (CHD) and 75 at high risk, with > or =3 CHD risk factors and/or diabetes mellitus, were enrolled. At 3 months, the mean BMI had decreased (34.4 to 31.7 kg/m(2), p <0.001), BNP had increased (median 18 to 28 pg/ml, p <0.001), and low-density lipoprotein, C-reactive protein, apolipoprotein B (all p <0.002), and angina frequency (p = 0.017) and severity (p = 0.052) had decreased. The subjects' physical limitations had decreased and their physical functioning had improved (all p <0.001). The percentage of change in BNP was inversely associated with the percentage of change in insulin (r = -0.339, p = 0.005, n = 63 nondiabetics). It was also inversely associated with the percentage of change in BMI (r = -0.28, p = 0.002, n = 116), and this association remained significant (p = 0.029) in multiple regression analyses controlling for age, gender, CHD, diabetes mellitus, percentage of change in lifestyle index, and beta-blocker use. The metabolic changes related to adipose tissue lipolysis could explain these findings. In conclusion, BNP increased in subjects experiencing weight loss while following a lifestyle intervention, and angina pectoris, physical limitations, and other CHD risk factors decreased. Therefore, in this context, increasing BNP might not indicate worsening disease or a worsening prognosis. Thus, the proposed use of BNP in monitoring disease progression should take into account changes in the BMI during the same period.
…, Jan 1, 2008
Journal of …, Jan 1, 2007
The Journal of …, Jan 1, 2008
To investigate the model of pedophilia as a disorder of addictive behavior, pedophiles and chemic... more To investigate the model of pedophilia as a disorder of addictive behavior, pedophiles and chemically addicted individuals were compared on personality traits potentially associated with impaired behavioral inhibition. Twenty-nine pedophiles, 25 opiate addicts (OA's), and 27 healthy controls were administered the Barratt Impulsivity Scale, Hare Psychopathy Checklist-Revised (PCL-R), and Structured Clinical Interview for DSM-V for Axis-II. OA's scored higher than either pedophiles or controls on the Barratt. Pedophiles and OA's scored higher than controls on all 3 Psychopathy Checklist-Revised scores but OA's scored marginally higher than pedophiles on factor 2 (behavioral) and total scores. On Structured Clinical Interview for DSM-V for Axis-II, pedophiles scored higher than controls on paranoid and schizoid scores whereas OA's did so on paranoid scores. Thus, both pedophiles and OA's may have elevated psychopathic traits and propensity toward cognitive distortions, as reflected in cluster A traits. Such similarities support the conceptualization of pedophilia as a behavioral addiction. Pedophiles may be less impulsive than OA's, however, and more prone toward cognitive distortions.
Journal of …, Jan 1, 2010
Journal of …, Jan 1, 2010
Given the recent interest in the concept of sexual addictions, it is instructive to study subject... more Given the recent interest in the concept of sexual addictions, it is instructive to study subjects with pedophilia alongside chemically addicted individuals and non-addicted controls in order to help identify which factors may determine the objects of people's respective addictions, as well as any factors that may predispose people to developing an addictive disorder. In this study, we considered whether childhood sexual abuse (CSA) is a specific risk factor for pedophilia as opposed to other types of addictive disorders by comparing the childhood sexual histories of 48 pedophilic sex offenders, 25 subjects with opiate addiction in remission, and 61 healthy controls. CSA was assessed with The Sexual History Questionnaire and the Child Trauma Questionnaire (CTQ). Compared with both opiate addicted subjects and healthy controls, subjects with pedophilia were more likely to report experiencing adult sexual advances when they were children and a first sexual contact by age 13 with a partner at least 5 years older. Although both subjects with pedophilia and those with opiate addiction first had sex at a younger age than healthy controls, opiate addicted subjects, compared with healthy controls, reported neither increased reception of sexual advances as children nor increased rates of first sexual contact before age 13 with a partner at least 5 years older. Further, subjects with pedophilia but not those with opiate addiction scored significantly higher than healthy controls on the CTQ. Sexual abuse in childhood may be a specific risk factor for sexual addictions such as pedophilia but may not be a specific risk factor for chemical addictions.