Evoked potentials and stages of information processing: Methods of analysis

The use of principal components analysis (PCA) for the study of evoked-response data may be complicated by variations from one trial to another in the latency of underlying brain events. Such variation can come from either random intra-and intersubject variability or from the effects of independent variables that are manipulated between conditions. The effect of such variability is investigated by simulation of these latency-varying events and by analysis of evoked responses in a behavioral task, the Sternberg memory search task, which is well known to generate variation in the latency of brain events. The results of PCA of within-subjects differences in these two situations are plausibly related to underlying stages of information processing, and the technique may augment reaction time data by providing information on the time of occurrence as well as the duration of stages of information processing.     

MacLaboratory Controller: A switch and A/D interface between Apple’s Macintosh and peripheral apparatus

Apple’s Macintosh microcomputer has advantages over other systems used for laboratory control and data acquisition, especially because of its graphic and user-friendly features. However, a major perceived limitation has been its closed architecture. We describe an interface using the RS 422 modem port that supports up to 64 input/output (I/O) functions including analog-to-digital 4–12 channel input. The Controller software supplies an easily edited authoring tool in which functional relationships, logical operators, timing (millisecond accuracy), and counting functions are established through simple mouse and menu commands. Data from I/O functions may be displayed or saved as tab-delimited files that can be opened by various Macintosh statistical and spreadsheet packages and that are transportable to some mainframe applications.     

The cognitive-somatic anxiety questionnaire: Psychometric and validity data

The Cognitive-Somatic Anxiety Questionnaire (CSAQ) is a 14-item self-report inventory that is divided into two 7-item scales (Cognitive and Somatic) that appear to reflect cognitive or somatic anxiety. In an attempt to evaluate the construct validity of this multidimensional instrument, the CSAQ was administered to 109 college students along with several other measures of physical and psychological symptoms. The results suggest that (a) despite considerable overlap between the Cognitive and the Somatic scales (r=.62), an exploratory factor analysis is able to identify a single large somatic factor along with three lesser cognitive-appearing factors, and (b) the correlations with concurrent measures of related constructs provide some limited evidence of the construct validity of the CSAQ. For males, both the Cognitive and the Somatic scales of the CSAQ correlated significantly with several anxietyrelated measures. However, for females CSAQ scores correlated less consistently with the other test scales, although Somatic scale scores for females were positively related to measures of health and exercise involvement. Suggestions for improving the CSAQ are offered.     

The influence of individual characteristics and severity of harassing behavior on reactions to sexual harassment

Differences in reactions to 18 scenarios depicting potentially sexually harassing situations were studied as a function of harassment severity and individual level factors. The scenarios illustrate a continuum of behavior, with some situations depicting overt sexual harassment and others portraying more innocuous behaviors. The individuals' reactions were strongly influenced by the perceived severity of the incidents. Reactions were influenced to a lesser extent by the individual level factors of gender, attitudes toward women, religiosity, and locus of control. Among these factors, gender had the strongest effect on reaction types. Findings indicate that harassment severity and individual level factors may combine to influence reactions to sexual harassment.The authors would like to thank Barbara Gutek and Gary Powell for their comments on an early draft of this paper.     

Individual differences in type A behavior and cardiovascular responses to stress

The purpose of this study was to predict heart rate and blood pressure responses to a stressor task in 166 male and female university students using the multidimensional approach of the Survey of Work Styles. The Survey of Work Styles is comprised of scales for Impatience, Anger, Time Urgency, Work Involvement, Job Dissatisfaction, and Competitiveness. Systolic blood pressure, diastolic blood pressure, and heart rate were measured before and during a 5 min serial subtraction task. Three bipolar Survey of Work Styles profiles were identified for each sex. In males, similarity to each profile was uniquely related to one task cardiovascular measure. In females, two of the three profiles were uniquely related to one physiological measure assessed during the task. The data thus support separate treatment of male and female data. Consideration was given to the possible influence of TABP components, such as Anger, in the differences in the patterns of physiological responses for different Type A profile types. Implications of the physiological results for future studies on psychophysiological differences between Type A and B individuals, and the pathological links between Type A behavior and coronary heart diseases are discussed with emphasis on the recognition of the heterogeneity of personality profiles associated with Type A behavior.     

Conflict of Interests and Commitment in Groups1

Behavioral commitment levels of group members were examined under conflict of interests between individual and collective tasks in a work-group scenario. Commitment was conceptualized as the amount of time and effort resources that individuals chose to allocate to the group task. Seventeen groups of three allocated 100 time and effort resource units to individual and group tasks for each of four trials. The level of commitment to group work increased, partially because over-rewarded persons increased group contributions more than underrewarded persons decreased them. However, the variance of allocations to the group task did not decrease over trials. Potential implications of the findings for organizational research and practice concerning work groups are discussed in terms of the roles of equity, comparative referent use, and information exchange.