Effects on choice of reinforcement delay and conditioned reinforcement

Pigeons chose between fixed-interval schedules of different durations presented in the terminal links of concurrent-chains schedules. The pair of schedules was always in the ratio of 2:1, but the absolute duration of the fixed intervals varied. In one set of conditions, the different terminal-link schedules were associated with different keylight stimuli (cued conditions). In a second set of conditions, the different terminal-link schedules were associated with the same stimulus (uncued conditions). Results from the cued conditions replicated previous findings that preference for the shorter fixed-interval schedule increased with fixed-interval duration. Preferences in the uncued conditions were lower than in the corresponding cued conditions but also increased with fixed-interval length. In addition, the degree of control under the uncued conditions was correlated with the extent to which the schedule during the terminal link was discriminated immediately upon entry into the terminal link. The pattern of results in both conditions was inconsistent with the notion that choice behavior matches relative immediacy of reinforcement. Reanalysis of previous evidence for matching (Chung and Herrnstein, 1967) showed that matching in fact did not occur, as the preferences of their subjects for the shorter of two delays also increased with the absolute size of the delays.     

Line segments are perceived better in a coherent context than alone: An object-line effect in visual perception

In a series of four experiments, observers identified a briefly flashed line segment more accurately when it was part of a drawing that looked unitary and three-dimensional than when the line segment was presented alone. This extends earlier findings of better identification of a line segment when it is part of an apparently unitary, three-dimensional drawing than when it is in a less coherent flat design; and these results demonstrate a visua1 effect analogous to the word-letter effect which uses nonlinguistic materials. Experiment 1 demonstrates the existence of the object-line effect and shows that it does not depend on the presence of a subsequent mask; Experiment 2 shows that the effect holds up with two-altemative forcedchoice presentation; Experiment 3 demonstrates that the effect is not due to bright end points which may occur when the target line appears with a context; and Experiment 4 shows that the effect is as strong when the target line segments occupy widely separated spatial locations as it is when they occupy nearby, potentially confusable locations.     

Imitative language and symbolic maturity in the single-word period

The purpose of this investigation was to examine spontaneous vocal imitation and explore its relationship, if any, to symbolic maturity as revealed in, play. These two facets were examined during the period of single-word utterances and early multiword combinations. Language samples were drawn from videotaped data recorded in the homes of five female children at free play during a 1-year period. Results revealed that for these five children there were consistent patterns of imitation. Imitation at first was infrequent, increased rapidly, and then declined. Although the timing of imitation was not the same for each subject chronologically, its occurrence was consistent with symbolic development.This study was supported by a grant from the National Institute of Education. It was presented at the 1975 Biennial Meeting of the Society for Research in Child Development.     

Contrast, component duration, and the following schedule of reinforcement

Experiment 1 investigated component duration in a four-component multiple schedule designed to separate the effects of the preceding schedule of reinforcement from those of the following schedule of reinforcement. The preceding schedule in the preceding component had no consistent effect regardless of component duration. The following schedule was a powerful determinant of behavior, however, with higher response rates resulting from a following period of extinction. Moreover, the effect of the following schedule was greater with short component durations, which strongly suggests that component-duration effects previously found with multiple schedules are due generally to variation in the degree of control by the following schedule. Experiments 2--4 investigated the basis of the effects of the following schedule. In some situations differential responding in the following component was the controlling variable, but in others it was differential reinforcement in the following component. The results are consistent with the view that response rate during a stimulus is inversely related to the "value" of the following component, where the calculation of value must include both primary and conditioned reinforcement.     

When it helps to be misled: Facilitative effects of increasing the frequency of conflicting stimuli in a Stroop-like task

Three experiments are reported that involve responding to the meaning or position of a word (Above or Below) presented above or below a fixation point. Position and word meaning conflicted (Above/below or Below/above) or were compatible (Above/above or Below/below), and the relative frequency of conflicting trials was varied. Experiment 1 required responses to the word and its position. Compatibility and frequency had no effect in the spatial task, but interacted strongly in the word task: Compatible stimuli were processed faster when conflicting trials were rare (20% conflicting), but conflicting stimuli were processed faster when they were frequent (80% conflicting). Experiments 2 and 3 used the word task only and extended these findings to intermediate (20%, 40%, 60%, and 80% conflicting) and more extreme (10%, 20%, 80%, and 90% conflicting) frequencies, respectively. The advantage for conflicting stimuli when they were frequent was taken as evidence for a strategy involving dividing attention between reported and unreported dimensions.     

Sex-role orientation and fear of success: Clarifying an unclear relationship

Inconsistencies in research concerning the relationship between fear of success (FOS) and sex-role orientation may be due to the use of sex-role inventories considering masculinity and femininity as endpoints of a bipolar continuum. The Bem Sex-Role Inventory (BSRI; Bem, 1974), which treats masculinity and femininity as separate dimensions, was administered to 218 female undergraduates in addition to measures of FOS, achievement motivation, and performance. It was predicted that women who were androgynous (high feminine and high masculine) would evidence less FOS than women who were high masculine or high feminine. It was also predicted that women who embraced masculine characteristics (androgynous or sex-reversed) would be higher in both achievement motivation and performance than low masculine women. Both predictions were confirmed. Sex-reversed women were highest in FOS.This research was conducted with the support of a David Ross Grant from the Purdue Research Foundation to Dr. Kay Deaux and the author. Thanks are extended to William A. Fisher, Dr. Kay Deaux, and Dr. Elizabeth Farris for their helpful comments on an earlier draft of this article. All correspondence should be addressed to Brenda Major, Department of Psychology, State University of New York at Buffalo, 4230 Ridge Lea Road, Buffalo, New York 14226.     

Psychological systems questionnaire: An objective personality test designed for on-line computer presentation,scoring, and interpretation

Previous research efforts to use on-line computer systems for personality assessment are briefly reviewed. Shortcomings in the conversion of paper-and-pencil testing forms to computer media are noted. Construction of a new instrument, specifically designed for use with an on-line computer system, is described. Advantages of this approach are noted.     

Career indecision in adult women: A comparative and descriptive study

This study compared 66 high-school women, 66 first-year college women, and 66 adult women on four measures of career indecision, the Satisfaction with Career Scale, the Occupational Alternatives Question, the Vocational Decision Making Difficulty Scale, and the Career Decision Scale. The results consistently suggested that the adult women were experiencing more career indecision than the high-school and college women. Intercorrelations among the scales were generally moderate to somewhat low and raised some questions about the use of the Career Decision Scale with adult women. Additional data were gathered on the adult women in an attempt to delineate the sample. Variables included were: marital status, present work experience, the career-related goals and the reasons for pursuing these goals, and possible impediments to reaching the goals. These results are presented and the implications for future research and counseling with adult women are examined.