The effects of varied acoustic parameters on performance in dichotic speech perception tasks

Five dichotic speech experiments were conducted with normal adult listeners in which the signal to one or both ears was degraded by manipulation of intensity, signal-to-noise ratio, or bandwidth parameters. Results suggest that: (1) performance of the ear (or ears) receiving the degraded signal can be predicted from the monaural identifiability of the stimuli, and (2) dichotic performance, at least in stop consonant-vowel tests, reflects an additive central process which combines speech information from the two ears.     

Some situational determinants of the motives attributed to the person who performs a helping act

Two studies were directed at the assessment of donor motives for and appropriateness and evaluation of an unsolicited helping act directed at a high versus a low power person by self or other Results of the first study demonstrated no differences between self and other, but highly significant differences between high and low power on all three dependent measures, with an act directed at a high power person being seen as more self-seeking and being more negatively evaluated. A manipulation of liking for other in the second study resulted in significant differences between self and a disliked other on all three measures, with more negative attributions and evaluations of die disliked other As predicted, there were no differences between self and a liked other Power differences remained significant over all conditions of self and other Results were considered not to be attributable to trans-situational need states of the low power person, however, the act was consistently viewed as more appropriate when directed at a low power person.     

The use of limit theorems in paired comparison model building

The Thurstone and the Bradley-Terry models, both initially advanced on intuitive grounds, have proved useful in the analysis of paired comparisons. The psychological meaning of these models and their relation to one another is unclear, but they fit data. Stevens has observed that there may be two basic mechanisms of discrimination 1) additive and 2) substitutive. We advance two corresponding mathematical models: that experienced sensation is 1) the sum of a large number of independent signals and 2) the maximum of a large number of independent signals. These assumptions yield 1) Thurstone's model and 2) the model of Bradley-Terry. Psychological interpretations of the various parameters, in terms of sensation, present themselves in a natural manner. Thus this paper presents a theory which unifies and interprets two paired comparison models that have proved useful in fitting experimental data.This research was supported in part by a National Science Foundation Grant GP 3807 and by the Army, Navy, and Air Force under ONR Contract # NONR-988(08), Task Order NR 042-004 with the Florida State University.     

Use of Reinforcement Technique with a First Grade Boy

A reinforcement technique in counseling was used to modify a first grader's attending behavior. Pre- and post-counseling measurements were made and cumulative records were kept of attending time in counseling sessions and in arithmetic lessons, and a record was kept of completion vs. noncompletion of arithmetic assignments. The assessments made in regard to the arithmetic lessons enabled an investigation of transfer effects from counseling to the academic area. An investigation of transfer effects was also informally made relative to other school situations. Results showed increased attending behavior in counseling and in the classroom, and a marked improvement in completion of assignments, and were interpreted as supporting the use of a behavioral approach in elementary school counseling.     

Interdigital transfer of kinesthetic after-effects

Two experiments investigated the effect of using a different finger for inspection (I) than is used in making judgments on the size of a kinesthetic aftereffect (KAE). Experiment I investigated transfer of I stimulation of the ring finger to judgments made with the index finger, A control group used the index finger for both judgments and 1 period. Results indicated significant KAE for both groups. Experiment II replicated Experiment I except the second finger was used to test for transfer of I stimulation to judgments made with the index finger. Results indicated KAE for only the control group which used the index finger for both judgments and 1 stimulation.     

Effect of amount of training on rate and duration of responding during extinction

Four experiments are reported in which the amount of CRF training prior to extinction is examined as it effects transient changes in response frequency and duration immediately following extinction onset. The first two experiments, using albino rats as subjects and water reinforcement, revealed a reliable relationship between length of time on CRF and the tendency to increase response frequency, duration, and the variability of response frequency and duration. Two comparative experiments were conducted using 53-to-69-month old children as subjects, and recorded music as reinforcement. The results of the first child study failed to conform with those obtained in the rat experiments. However, manipulation of the reinforcer in a subsequent study reproduced the rat extinction effect. Despite the differences in the rat and child experiments, the qualitative similarity of the results of the four studies suggests a basic underlying comparability of the relationship between the amount of training and transient changes in response frequency.