Two-part stimulus integration and specific reading disability.

29 dyslexics and 29 control children were presented with two halves of a black cross, one-half being presented at varying interstimulus intervals after the other half. Both dichoptic and binocular presentations were used and separation thresholds were at greater interstimulus intervals for the dichoptic condition. Dyslexics had thresholds at greater intervals than controls. These differences were significant and there was no significant interaction of group by dichoptic condition. The relative magnitudes of difference between dyslexics and controls were as previously reported by Stanley and Hall (1973) and support the notion that dyslexics have longer visual persistence than controls.     

Personality patterns of white,black, and Mexican-American patrolmen as measured by the Sixteen Personality Factor Questionnaire

The Sixteen Personality Factor Questionnaire was administered to 461 Los Angeles patrolmen to abtain a normative police profile. Multivariate analysis revealed that the average patrolman appeared brighter, more reserved, dominant, and tough-minded (p less than .001) than the average male. Comparisons were made for 29 black, 33 Mexican-American, and 399 white officers. Mexican-American officers emerged as more conservative and relaxed than whites, while black officers appeared more experimental, analytical, and group-oriented. A comparison with an idependent police sample revealed common traits of self-assurance and conservatism. Results were compared with a social workers' profile and discussed in relation to police officers' actual job activities and community needs.     

Tutor Attributions and Attitude As a Function of Tutee Performance1

In a single-session tutoring situation, a sixth-grade tutor taught a concept-formation task to a third-grade tutee. Over the series of trials, performance of the tutee was controlled to create differential patterns of success and failure on the task: success-success, failure-failure, success-failure, and failure-success. Results showed that sequence of performance exerted a strong impact on the tutor's attributions of ability and affective responses concerning the tutee. The tutee's initial performance had greater impact on the tutor's reactions than later performance, indicating a strong primacy effect. Differential performance by the tutee did not affect the tutor's evaluation of his own teaching ability.     

Effects of Job Redesign: A Field Experiment1

A telephone company project to redesign the job of directory assistance operator was: studied in order to determine the effects on workers of “job enrichment” programs. The change increased the amount of variety and the decisionmaking autonomy in the operator's job. However, no change in work motivation, job involvement, or growth need satisfaction occurred as a result of the changes; instead, the changes had a significant negative impact on interpersonal relationships. After the changes, the older employees reported less satisfaction with the quality of their interpersonal relationships, and those supervisors whose jobs were affected by the changes reported less job security and reduced interpersonal satisfaction. Implications of these findings for the theory of job redesign proposed by Hackman and Lawler (1971) are discussed.     

An empirical taxonomy of visual illusions

A classification system for visual-geometric illusions, based upon the interrelationships between behavioral responses to various distortions was created. Forty-five illusion configurations were presented to 221 observers. Factor analysis revealed that there are five classes of illusions. A secondorder analysis revealed that visual distortions are ultimately reducible to two global types of distortions: illlusions of extent and illusions of shape or direction.     

Prior experience as a moderator of disaster impact on anxiety symptoms in older adults

As participants in a panel study, 234 older adults were interviewed before, as well as after, serious flooding occurred in southeastern Kentucky. Floods are not uncommon in this area, but these were more widespread than most, and resulted in both previously exposed and newly exposed subsamples of disaster victims. Flood impact was measured at both personal and community levels. With preflood symptoms controlled, there were modest flood effects on both trait anxiety and weather-specific distress in older adults without prior flood experience, but no flood effects in older adults who had been in floods before. Thus, the study provides support for the "inoculation hypothesis" and other conceptualizations that emphasize the advantage of being familiar or experienced with a stressor that is at hand. An implication is that "experienced" victims could be a valuable resource in prevention efforts.     

Application of model-selection criteria to some problems in multivariate analysis

A review of model-selection criteria is presented, with a view toward showing their similarities. It is suggested that some problems treated by sequences of hypothesis tests may be more expeditiously treated by the application of model-selection criteria. Consideration is given to application of model-selection criteria to some problems of multivariate analysis, especially the clustering of variables, factor analysis and, more generally, describing a complex of variables.