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James Coker

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Research paper thumbnail of Unscreened: Urgent and Emergent Surgical Outcomes in the Early COVID-19 Pandemic

Research paper thumbnail of Serial cognitive assessment in an outpatient rehabilitation setting

Archives of Clinical Neuropsychology, 2001

In spite of the fact that reaction time (RT) measures are sensitive to the effects of traumatic b... more In spite of the fact that reaction time (RT) measures are sensitive to the effects of traumatic brain injury, few RT procedures have been developed for use in standard clinical evaluations. One exception to this is the Computerized Test of Information Processing (CTIP: Tombaugh & Rees, 2000) that was designed primarily to measure the degree to which traumatic brain injury (TBI) decreases attentional processes, particularly the speed at which information is processed. The CTIP consists of three computerized programs that progressively increase the amount of information processed. The most basic CTIP reaction time test is Simple RT where the space bar is pressed as soon as a single stimulus (X) appears in the centre of the screen. The complexity of processing is increased in the Choice RT by the addition of a decision component, which is based on the ''form'' of the stimulus (concrete/literal processing). Complexity of processing is further increased in the Semantic Search program by adding a conceptual component to the decision process, which is based on processing the meaning of the stimulus (conceptual/semantic processing). The current research presents preliminary normative data for these tests that clearly show that the progressive increase in cognitive loads associated with the three subtests are reflected in progressively longer reaction times. Clinical evidence is presented to illustrate the clinical utility of the CTIP.

Research paper thumbnail of Unscreened: Urgent and Emergent Surgical Outcomes in the Early COVID-19 Pandemic

Research paper thumbnail of Serial cognitive assessment in an outpatient rehabilitation setting

Archives of Clinical Neuropsychology, 2001

In spite of the fact that reaction time (RT) measures are sensitive to the effects of traumatic b... more In spite of the fact that reaction time (RT) measures are sensitive to the effects of traumatic brain injury, few RT procedures have been developed for use in standard clinical evaluations. One exception to this is the Computerized Test of Information Processing (CTIP: Tombaugh & Rees, 2000) that was designed primarily to measure the degree to which traumatic brain injury (TBI) decreases attentional processes, particularly the speed at which information is processed. The CTIP consists of three computerized programs that progressively increase the amount of information processed. The most basic CTIP reaction time test is Simple RT where the space bar is pressed as soon as a single stimulus (X) appears in the centre of the screen. The complexity of processing is increased in the Choice RT by the addition of a decision component, which is based on the ''form'' of the stimulus (concrete/literal processing). Complexity of processing is further increased in the Semantic Search program by adding a conceptual component to the decision process, which is based on processing the meaning of the stimulus (conceptual/semantic processing). The current research presents preliminary normative data for these tests that clearly show that the progressive increase in cognitive loads associated with the three subtests are reflected in progressively longer reaction times. Clinical evidence is presented to illustrate the clinical utility of the CTIP.

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