Intervention in the Library: The Effect of Increased Responsibility on Bystanders' Willingness To Prevent a Theft

Two field experiments tested the hypothesis that a bystander's increased responsibility to act increases the likelihood of his helping the victim of an emergency. In Experiment 1, an individual asked or did not ask the bystander to protect his property in his absence. In Experiment 2, the presence/absence of an unattentive confederate was varied orthogonally to the request/no request manipulation. The results of both experiments indicated that bystanders who received a prior request for protective assistance felt more personally responsible for protecting the individual's property and were more likely to prevent a theft of that property than were bystanders who received no request. The presence of a confederate in Experiment 2 decreased bystanders' felt responsibility and their willingness to intervene on the victim's behalf. The results were interpreted as support for the "felt responsibility" proposition of the Latané and Darley (1970) model of bystander intervention.     

Inferences about the femininity of competent women and their implications for likability

Male (N=59) and female (N=60) college students were given a written protocol describing a competent, achievement-oriented female stimulus person (SP) with either a masculine or feminine pattern of vocational and avocational interests. Three groups were given a masculine-pattern protocol and one group was given a feminine-pattern one. They were then asked to rate the SP on likability in work and social settings, femininity, and a number of other personal attributes. Two groups given the masculine-pattern protocol were also supplied with the SP's responses to items from a “personality” test answered in a predominantly feminine (Masculine—Feminine SP) or masculine (Masculine-Masculine SP) direction. The remaining groups (Masculine-Neutral and Feminine-Neutral SPs) were given no additional information. In agreement with previous findings, the Masculine-Neutral SP was liked more in social settings than was the Feminine-Neutral one. It was hypothesized and confirmed that the Masculine-Neutral SP would be perceived as similar to the Masculine-Feminine SP in femininity and likability and that both these SPs would be judged to be higher on these characteristics than the Masculine-Masculine. Complex results were obtained from the ratings of other attributes. Overall, they indicated that the Masculine-Feminine SP, in whom femininity was explicitly suggested, received the weakest ratings on a series of achievement-related attributes and the Masculine-Neutral SP the strongest.     

Implications of measurement of eye fixations for a psychophysics of form perception

It was suggested that insights into feature analysis of processes involved in form identification might be gained from an analysis of eye movements made by Ss as they identified patterns. Fixations were measured during identifications of histoforms, polygons, and Vargus 10 figures. Eye fixations were measured, and Ss rated sections of the figures in terms of their importance. Eye fixations were measured in terms of number of changes and duration of fixations. The number of changes in fixation were found to reflect only individual differences. Duration of fixation was found to vary significantly with location within figures, with fixations being longest where changes of contour occurred. There was also a tendency to look longer at the top of polygons and Vargus 10 figures and at the center of histoforms. Ratings of importance were highest for sections of figures fixated for longer duration-generally areas in which changes of contour were present.     

Retrieval processes in recall

A reaction time (RT) paradigm was developed to study retrieval processes in paired associate (PA) recall. Prior to the experimental session, subjects learned lists of PAs (varying in length from three to 24 pairs); during the experimental session, subjects' RT to say the response word from the onset of a visually presented stimulus word was measured. The implications of several classes of retrieval models were discussed in the context of this paradigm. The shape of the RT-list length function, practice, and sequential effects were all of interest in distinguishing among models. Four experiments were reported which were designed to (1) establish the baseline effects in this paradigm, (2) determine which of these effects should be attributed to the retrieval stage of processing, and (3) investigate the effect of semantic memory in this task. Results suggest that simple serial scanning models are inadequate to handle the data from this task. Strength, direct-access, or parallel processing models, on the other hand, seem to capture the qualitative effects present in our experiments. When a strength model was formalized and fit to the data from Experiment I, it was found that a two-trace version gave good quantitative fits while a one-trace version did not, suggesting that both short- and long-term memory independently contribute in this task.     

Motivation concepts and sexual identity

The association dimension of the Picture Identification Test (PIT) was used to investigate the motivation concepts of male and female university students classified as Declared Homosexual, Sexually Uncertain, Clinical Control, and Normal Control. The t test was used to identify Need Association Dyads which discriminated (p < .01) groups. Greater than chance numbers of variables discriminated each of the pairs of groups within each sex except the Sexually Uncertain versus Clinical Control Male groups, the Declared Homosexual versus Clinical Control Female groups, and the Declared Homosexual versus Normal Control Female groups. PIT Need Association Dyads were discussed as a type of implicit personality theory assessment with emphasis on the beliefs subjects hold about the simultaneous expression of needs.     

What’s up in mental rotation?

We report two experiments on the influence of head tilt on mental rotation. In Experiment I, subjects decided whether dot patterns were or were not repeated about a line. Their reaction times (RTs) were consistent with the interpretation that they mentally rotated the patterns so that the line was subjectively vertical before making their decisions. When the subjects tilted their heads, the RT functions shifted in the direction of the tilt, indicating that the subjective vertical lay closer to the retinal than to the gravitational vertical. In Experiment II, subjects decided whether singly presented alphanumeric characters in various orientations were standard or backward (mirror-reversed). Again, analysis of their RTs suggested mental rotation to the standard upright, but the function was unaffected by head tilt; in this case, the subjects operated in subjective gravitational rather than retinal coordinates. The choice of retinal or gravitational coordinates may depend on whether the stimuli are interpreted egocentrically or as part of the external world.     

Book Reviews

J oseph B. W heelwright (Ed): The analytic process: aims, analysis, training
A. A lvarez : The savage god
B ernard A aronson and H umphrey O smond (Eds.): Psychedelics: the uses and implications of hallucinogenic drugs
E rnst B ernhard : Mitobiografia
B arbara H annah : Striving towards wholeness
C raig R. E isendraht : The unifying moment: the psychological philosophy of William James and Alfred North Whitehead