Some differences between phonetic and auditory modes of perception

When third-formant transitions are appropriately incorporated into an acoustic syllable, they provide critical support for the phonetic percepts we call [d] and [g], but when presented in isolation they are perceived as time-varying ‘chirps’. In the present experiment, both modes of perception were made available simultaneously by presenting the third-format transitions to one ear and the remainder of the acoustic syllable to the other. On the speech side of this duplex percept, where the transitions supported the perception of stop-vowel syllables, perception was categorical and influenced by the presence of a preposed [al] or [ar]. On the nonspeech side, where the same transitions were heard as ‘chirps’, perception was continuous and free of influence from the preposed syllables. As both differences occurred under conditions in which the acoustic input was constant, we should suppose that they reflect the different properties of auditory and phonetic modes of perception.     

‘Random’ saccadic eye movements during verbal-linguistic and visual-imaginal tasks

Previous research has suggested that questions eliciting visual imagery are associated with lower rates of saccadic eye movements as compared to questions eliciting verbal processes. Two experiments reported here examined the roles of external visual stimulation and speech output in this effect. In both experiments, questions designed to elicit verbal-linguistic or visual-imaginal processing, and which required either syntactically complex or simple responses, were administered while eye movements were recorded by electrooculography. In experiment 1, 42 subjects responded while viewing either the interviewer's face or a gray oval on a video monitor. Imaginal questions elicited a lower rate of eye movements than did verbal questions regardless of the display on the monitor. In experiment 2, 17 subjects responded in conditions of light and darkness. Imaginal questions elicited lower rates of eye movements in both light and dark. Neither cognitive mode nor speech output requirements interacted with stimulus conditions in either experiment. The failure of visual conditions to influence the verbal-imaginal difference in eye movement rate is viewed as inconsistent with a visual interference interpretation of the relationship of eye movements to cognitive activity. Alternate interpretations are discussed.     

Use of first person pronouns as a function of increased objective self-awareness and performance feedback

A recent integrating formalation in social psychology, the Duval-Wicklund theory of “objective self-awareness,” has the core assumption that attention focused on the self is always aversive and, hence, avoided. While faced with either a TV camera or a mirror, and after they had received false feedback concerning their creativity, 98 undergraduates guessed at the meaning of foreign language pronouns, the unobtrusive dependent measure of the direction of the focus of attention. The standard Duval-Wicklund effect was replicated—more attention to self, that is, more first-person pronouns—in the “camera” or “mirror” than in the “no camera” or “no mirror” conditions. However, within the camera or mirror conditions, avoidance of self-focused attention occurred only after negative feedback.     

Developmental changes in predicting one's own span of short-term memory

Developmental changes in the accuracy of predicting one's own recall were studied, using preschool, third grade, and college subjects in Experiment 1 and third grade and college subjects in Experiment 2. Experiment 1 showed that prediction accuracy increased from the preschool to the college years, subjects were not influenced by a potential “expectancy” bias in the procedure, and only third grade subjects were influenced by the presence of norms about peer performance. Experiment 2 showed that third graders and college subjects lower their predictions in the face of “false” norm information, with college subjects being the only group to under predict actual recall in both experiments. Thus, although adults are significantly more accurate than elementary shool children in estimating short-term recall, their susceptibility to norm information suggests that even they have uncertainty about their exact capabilities.     

The effect of children's spontaneous cognitive sets on discrimination learning

Two experiments investigated the role of children's spontaneous cognitive “sets” in pictorial discrimination learning. Lists were constructed to highlight either perceptual or conceptual similarities among the stimuli. In each experiment age by treatment interactions revealed that in comparison to the behavior of older children (sixth graders), that of younger children (kindergartners) is governed more by the perceptible than by the conceptual attributes of stimuli—data in complete accord with Bruner's view of cognitive development.     

Developmental trends in recall of central and incidental auditory material

An auditory recall task, involving central and incidental stimuli and designed to correspond to that used in visual selective attention studies, was developed and presented to second-, fourth-, sixth-, and eighth-graders. There were significant differences in favor of older compared to younger Ss and girls compared to boys. In addition, Ss performed better when animals were the relevant and foods the irrelevant stimuli than vice versa. The nature of the developmental increase in auditory recall of central vs incidental stimuli demonstrated in this task was discussed in terms of developmental trends found in the visual modality. The sex differences and differences found for the animals vs foods condition were discussed with regard to differential short-term memory strategies.     

Sex and sociability in rats

Three experiments explored the effects of sexual motivation and the opportunity for sexual contact on social attraction in rats. Rats were no more gregarious in cross-sex than in same-sex pairings. Increased male sexual experience and hormonally induced female receptivity both led to increased sexual activity but had no effect on social behavior. Males housed with continuously receptive females showed signs of sexual exhaustion but were as gregarious as males housed alone or with males. It appears that social attraction in rats is not motivated primarily by sexual desires, either direct or sublimated.     

Stimulus probability and prediction outcome as determinants of choice reaction time: Some procedural considerations

Effects of stimulus probability and prediction outcome on two-choice reaction speed (CRS) were determined when a frequency imbalance was reversed half-way through 300 samples of a 70/30 stimulus distribution and when the same 70/30 distribution was sampled for 1200 trials. Prior to each presentation Ss made a prediction; following each presentation Ss identified the stimulus by pressing a right-hand or left-hand trigger. CRS was faster to correctly predicted stimuli, and faster to the more probable stimulus. Ss who were informed of the frequency imbalance reacted significantly faster than Ss who were not. Both practice and boredom effects were demonstrated by using the extended number of trials. CRS was faster during the second session of 300 trials than during the first; after two sessions, CRS was slower during the second half of two additional sessions.     

The actual and retrospective-occupational self-concept dimensions of retired educators

A 20-item adjective checklist was used by 118 retired educators to describe their actual and retrospective-occupational self-concepts. The men made their retrospective ratings for middle-aged and preretired occupational roles. The intercorrelations among the self-concept ratings were multiple-set factor analyzed, and seven common dimensions were identified: (1) stability, (2) conventionality, (3) independence, (4) practicality, (5) status, (6) confidence, and (7) cleverness. The results suggested that the retired educators had used the same dimensions in describing their actual and retrospective-occupational self-concepts. The percentages of variance contributed by the dimensions within the self-concept structures were also reported and discussed within the framework of career development.