Identification,discrimination, and match-to-sample as instances of comparative judgment

Identification, discrimination, and match-to-sample paradigms are discussed in the context of a comparative judgment between an external stimulus and a memorial representation. An experiment comparing the paradigms at different levels of stimulus dimensionality is described. The absence of clear-cut interactions of the paradigms with dimensionality differences is offered as support for the contention that the three seemingly diverse procedures may be considered as part of a comparative judgment continuum,with performance differences reflecting increased memorial demands.     

EM algorithms for ML factor analysis

The details of EM algorithms for maximum likelihood factor analysis are presented for both the exploratory and confirmatory models. The algorithm is essentially the same for both cases and involves only simple least squares regression operations; the largest matrix inversion required is for aq ×q symmetric matrix whereq is the matrix of factors. The example that is used demonstrates that the likelihood for the factor analysis model may have multiple modes that are not simply rotations of each other; such behavior should concern users of maximum likelihood factor analysis and certainly should cast doubt on the general utility of second derivatives of the log likelihood as measures of precision of estimation.     

CULTURE AND COGNITIVE GROWTH1

Culture et progrès cognitif. — L'article est consacré à la relation entre différences culturelles et progrés cognitif. Aprés avoir passé en revue et critiqué les tentatives antérieures d'approche anthropologique et psychologique du problème, les AA. étudient deux foyers de variations culturelles, à savoir L'orientation des valeurs et le langage, dans leur rapport avec le développement. Une grande partie des faits sur lesquels ils s'appuient provient de recherches expérimentales sur la conservation de la quantité et la formation des concepts chez les Wolofs du Sénégal. Ils discutent, en terminant, de L'interaction des contraintes culturelles qui sont variables et de la maturation biologique qui est universelle.     

Measuring post-traumatic stress: A psychometric evaluation of symptom- and coping questionnaires based on a Norwegian sample

The purpose of this study was to evaluate the psychometric characteristics of the Norweigian versions of the Impact of Event Scale, the Post Traumatic Stress Scale-10 item version and General Coping Questionnaire-30 item version. A group of 40 male and 56 female medical students was tested one week and four months after having started dissection of cadavers for the first time. The results showed that all scales had good internal consistency and test-retest reliability. The student sample scored lower on the IES and PTSS-10 than comparable groups of traumatized subjects. A gender difference emerged, with female subjects scoring higher than male subjects. The factor analysis of the instruments indicated good construct validity for the symptom scales. The analysis of content validity related to DSM IV criteria indicated that the IES and PTSS-10 may have some limitations in their predictive validity of PTSD. Taken together, the three scales have shown good psychometric properties and could be used in future research and clinical work.     

Decision making under time pressure: An independent test of sequential sampling models

Choice probability and choice response time data from a risk-taking decision-making task were compared with predictions made by a sequential sampling model. The behavioral data, consistent with the model, showed that participants were less likely to take an action as risk levels increased, and that time pressure did not have a uniform effect on choice probability. Under time pressure, participants were more conservative at the lower risk levels but were more prone to take risks at the higher levels of risk. This crossover interaction reflected a reduction of the threshold within a single decision strategy rather than a switching of decision strategies. Response time data, as predicted by the model, showed that participants took more time to make decisions at the moderate risk levels and that time pressure reduced response time across all risk levels, but particularly at the those risk levels that took longer time with no pressure. Finally, response time data were used to rule out the hypothesis that time pressure effects could be explained by a fast-guess strategy.     

How to drastically reduce priming in word stem completion—and still present the words

This paper describes a series of experiments in which we demonstrated that "dysphonemic" word stems, which are likely not pronounced in isolation as they are within a word (e.g., MUS in MUSHROOM or LEG in LEGEND), showed less priming than did "phonemic stems" (e.g., MUS in MUSTARD or LEG in LEGACY). Furthermore, words with either dysphonemic or phonemic three-letter stems gave rise to equivalent levels of priming when test cues were four-letter stems (LEGE) or word fragments (L_G_ND). Moreover, the difference between phonemic and dysphonemic stems persisted when nonpresented completion rates were matched. A final cued-recall experiment revealed that performance was greater for phonemic stems than for dysphonemic stems and that this difference was greater for older participants than for younger ones. These results are not readily accounted for by extant theoretical approaches and point to important methodological issues regarding stem completion.     

Reexamining Personal and Situational Factors in Drunk Driving Interventions1

Informal peer intervention may be an effective means of combating drunk driving. Prior research finds that: (a) An experimental model of decision making in bystander intervention situations can successfully be applied to drunk driving intervention (DUI intervention); and (b) various personal and situational factors influence a person's decision to intervene. Our research examines questionnaire data and finds support, with some modification, for application of the experimental model to DUI intervention. We also find that a person's self-evaluation as a competent helper is often the most important factor in determining whether or not they intervene. This suggests that empowering persons as interveners may be an effective means of decreasing drunk driving.     

Dominance: Another Facet of Type A1

Aggression, but not dominance, is typically used as a criterion for the assessment of Type A behavior. This study proposed and demonstrated that nonaggressive dominance, defined as interpersonal resistance or persistence in efforts to control a competitive situation, is associated with Type A behavior for both males and females. Forty males and 35 females typed with the Jenkins Activity Survey participated in a revised version of the classic Deutsch and Krauss (1960) competition paradigm. Both A males and females were more dominant than their respective Type B counterparts. Type A males were not different from Type A females in persistence, nor were Type B males different from Type B females. Female Type A's were more resistant to their competitor's efforts at controlling the situation than were their Type B counterparts. Male Type A's did not differ from their Type B counterparts in resistance. The implications of these results in further elucidating the mechanisms underlying the relationship between Type A and pathophysiologic health hazards are discussed.     

Adolescent Adjustment and Coping Strategies

This study examines the relation between psychosocial adjustment and coping strategies among college freshmen. Three hundred thirty-one college students completed the Inventory of Psychosocial Development (IPD; Constantinople, 1969) and the Adolescent Coping Orientation for Problem Experiences (ACOPE; Patterson & McCubbin, 1987) inventory. Factor analysis of the ACOPE scales revealed two factors interpreted to represent the coping strategies of "salutary effort" and "stress palliation." For each subject a relative salutary effort score was calculated to reflect the proportion of coping efforts ascribable to mature, salutary coping efforts. Optimal adjustment was associated with adolescents whose reported means of dealing with tension reflected a high proportion of salutary effort. These findings, which support the notion of a covariation between styles of coping and psychological adjustment among adolescents, are discussed in light of psychosocial development, coping, and methodological issues related to research on coping and adjustment.