A versatile low-cost interface module that features optical isolation

The complete design and construction of a versatile low-cost interface module are presented. This module functions as a combination pulse lengthener-stretcher with an added feature of optical isolation between the input and output circuits. It is useful in interfacing many behavioral and physiological instruments that utilize different voltage levels and polarities in their respective logic systems. The cost of the components needed for module construction (without power supply) is approximately $15.     

La relativite de la logique

Sans résumé     

Evaluation of the Performance of Experimenters as a Function of Their Sex and Competence1

A study was conducted to investigate evaluations of experimenters as a function of their sex and competency. It was hypothesized that (a) competent male and female experimenters would be evaluated as equal in competence, but that females acting incompetently would be judged as less competent than would males who were also acting incompetently and (b) competent females would be judged as less feminine relative to incompetent females; whereas incompetent females would be judged as extremely feminine. Undergraduate males and females viewed videotapes of male or female experimenters acting either competently or incompetently and then rated these experimenters on a 20-item semantic differential scale. It was found that when the female experimenters unambiguously displayed competence, they were judged as of equal competence to male experimenters acting in a similar manner; in the incompetent condition, however, female experimenters were judged as less competent than male experimenters. Competent females were perceived as less feminine than incompetent females; incompetent females were perceived as more feminine than females in any other experimenter condition. It was postulated that these findings were due to (a) subjects’expecting incompetency of women and (b) subjects’equating competence with the masculine role and incompetence with the feminine role.     

Individual aggression and a violent society

The first was [a woman], 32, waiting for a bus on San Francisco's Geary Boulevard at 7:57 one evening last week. A man stepped up to her, shot her twice fatally in the chest, and ran back to a waiting dark-colored Cadillac. Ten minutes later and eight blocks away ? a retired Coast Guardsman who had turned 69 that day was struck down by three bullets in the back and belly. At 9:15, near Market Street, octogenarian ? died instantly from two bullets in his back. Three miles south, at 9:50, [a woman], 45, was cut down as she stood in the doorway of a laundromat. And ten blocks away, at 10:10, [another woman], 23, the mother of a four-month-old boy, was climbing the stairs to her new house when a man walked up and said amiably, “Hi, howya doin'?” [She] turned to reply, and a bullet burrowed through her body to her spine, possibly paralyzing her for life. (“Crime: Nothing Personal,'Newsweek February 11, 1974.)     

Predicting effectiveness of bayesian classification systems

A model is presented for evaluating potential effectiveness of a Bayesian classification system using the expected value of the posterior probability for true classifications as an evaluation metric. For a given set of input parameters, the value of this complex metric is predictable from a simply computed row variance metric. Prediction equations are given for several representative sets of input parameters.     

The effects of sex and sex-role identity on the attribution of maladjustment

This study examined the effects of a stimulus person's gender and sex-role identity and an observer's gender and sex-role identity on the observer's judgments of the stimulus person's personality and level of adjustment. After having been classified as androgynous or nonandrogynous, 141 males and females viewed videotapes of a case conference on a bogus client. In the videotapes the client's gender and sex-role identity were factorially manipulated. As predicted, male clients and clients with a masculine sex-role identity were seen as possessing less favorable personality characteristics and as being less mentally healthy than were female clients and clients with a feminine history. Sex-role incongruence (e.g., a masculine female) influenced the subjects' judgments only of a female client. A sex-role congruent female was seen as more attractive and better adjusted than a sex-role incongruent female. The subjects' gender and sex-role identity did not influence their judgments of the clients in any consistent or interpretable fashion. Finally, it was found that the subjects were most influenced by sex-role congruence/incongruence of opposite sex stimulus persons. The discussion of these results centered on: (a) the relative influence of gender and sex-role identity on people's perceptions of a stimulus person and (b) the need for further exploration of how subject characteristics might influence these perceptions.This study is based on a Masters thesis submitted to the University of South Florida in partial fulfillment of the requirements for the Master of Arts degree. Portions of the study were presented at the 1978 meeting of the Southeastern Psychological Association. All correspondence should be sent to the second author c/o Department of Psychology, University of South Florida, Tampa, Florida 33620.     

Effects of sexual attitudes and physical attractiveness on person perception of men and women

A sample of 180 males and 180 females completed person perception measures for stimulus women who varied in physical attractiveness and permissiveness of sexual attitudes. The results indicated that both physical attractiveness and sexual attitudes had strong effects on peson perception. Physically attractive stimulus women were rated higher than the unattractive stimulus women on a physical appeal factor and an item measuring interpersonal attraction. The sexually conservative women were rated higher on an evaluative factor, lower on a personability factor, and higher on the interpersonal attraction item than the sexually permissive stimulus women. It was also found that the effects of physical attractiveness were greater for males than for females and that women rated the sexually permissive stimulus women less favorably than did men.     

A survey of communicative disorders students' attitudes toward stuttering

Cooper's (1975) Clinician Attitudes Toward Stuttering (CATS) inventories were conpleted by 1,902 speech-language pathology and audiology students from 33 universities, each in a different state. The majority of respondents perceived stutterers as having psychosocial problems and believed that client and parental counseling were essential aspects of treatment. These views were relatively unaffected by student training and clinical exposure. In addition, most of the assumptions of Johnson's diagnosogenic theory of stuttering were held by the majority of the students surveyed. Most of the respondents believed that stuttering was difficult to modify and that speech clinicians were neither adept nor comfortable treating stutterers. These latter attitudes were significantly affected by training, i.e., the more advanced the students' training, the more pessimistic their views on clinician competence. Other professional attitudes and the effect of training on them are also discussed.