Acoustic and associative coding in short-term memory

Short lists of word-digit pairs were presented to 456 college student subjects. One of the words was repeated as a memory probe either immediately after list presentation or after a short rehearsal interval. The stimulus words were either acoustically identical or associatively related (UP, DOWN). Both acoustic identity and associative relatedness produced a memory decrement which decreased with rehearsal. One interpretation of these results is that the primary memory trace is a multiple-dimension one and that, given time, subjects can recover non-acoustic information from it. The data also indicate that the “fate” over time is different for acoustically similar and associatively related items.     

The effects of instructions,fixed rate of presentation,and complexity on free looking time

The effect of stimulus complexity, prior experience with a short or long fixed rate of presentation (FRP) and S’s knowledge concerning the purpose ot the experiment on free looking time (FLT), was examined. Results indicated that under all conditions, Ss view complex stimuli longer than simple. A long FRP produced longer FLT than did a short FRP for Ss uninformed of the purpose of the experiment, hut FRP had no effect on FLT for Ss who were informed.     

Clock-delivered reinforcers in conjunctive and interlocking schedules

The effects of different temporal requirements in conjunctive and interlocking schedules of reinforcement were examined. The compound schedules were arranged so that a reinforcer could be delivered by either a rat's response or a clock. As the temporal requirements increased in the interlocking schedules, the overall rate of responding increased, but the pattern of responding remained relatively unchanged. As the temporal requirement increased in the conjunctive schedules, the overall rate decreased and a pause-and-run pattern of responding emerged. When the response requirement was reduced to one in the conjunctive schedule for one animal, a low and extremely stable rate of responding developed.     

TOWARD LIMITING AURAL SCRUPULOSITY WHILE LISTENING

Historically, emphasis has been placed on developing verbal skills toward the goal of improving communication. Success, however, has been limited because this emphasis has been misplaced. The burden of effective communication rests upon the listener and is dependent upon his ability to perceive and interpret not only the verbal but principally the non-verbal forms of expression. It is virtually impossible to understand and help a person without the ability to understand the total communication pattern. The communicant must also be aware that what has a certain significance to one person has an entirely different meaning to another.     

A simple tachistoscope for student labs

An inexpensive tachistoscope for student labs is described that utilizes a camera shutter to control exposure duration and a potentiometer to vary light intensity. Stimuli can be drawn or typed on 3 x 5 index cards.     

Perception of sequentially presented tactile point stimuli

Either two or three brief (10 msec) airjet stimuli were sequentially presented to any of the 24 interjoint regions of the fingers (thumbs excluded). The stimulus onset interval (SOI) ranged from zero (simultaneous presentation) through 200 msec. The S’s task in one part of the experiment was to report the positions stimulated in the order that the stimuli were presented; in a second part it was to rate the apparent motion produced by the stimulus sequence. While the ability of Ss to spatially localize the stimuli was a constant independent of SOI, their ability to temporally order the stimuli depended strongly on SOI. With two stimuli, these sequential errors decayed exponentially with SOI with a time constant of 26 msec. With three stimuli, however, both the sequential errors and equivalent temporal Urnen were more than twice as large as with two stimuli, indicating that the three-stimulus task is considerably more difficult than the two, and that the same simple temporal resolution model does not explain both cases. A model with a constant rate of information uptake, however, can explain both of these cases.     

Client Assessment Issues: A Perspective

A review of client assessment issues is presented within the context of pro- and anti-assessment influences. Shortcomings are identified in both formulations, particularly in the failure of their proponents to take full cognizance of the complex intertwining of scientific and philosophic components in assessment. A multivariate research paradigm is posited. Implications of the presented conceptualization for counseling practice are discussed.     

A Content Analysis Technique for Evaluating Outcomes in Counseling

This study involved the content analysis of tape-recorded interviews in an attempt to validate criteria used for evaluating outcomes of counseling. A reputation (sociometric) inventory was used to select three types of students: socially effective, aggressive, and withdrawn. Each student was interviewed by a trained interviewer, and the content of interviews was analyzed according to topics discussed and affect associated with the topics. In general, socially effective students discussed a significantly greater number of topics than either the aggressive or withdrawn students. Few significant differences were found in positive- to negative-affect ratios but the socially effective did generally display more positive affect than the other groups. Though this study failed to validate this technique for appraising outcomes of counseling, the investigators believe that it has promise sufficient for further research.     

Discriminative properties of shock-correlated reinforcement in an operant context

A two-choice discrete operant procedure was devised for the study of shock-correlated reinforcement effects in rats. In the presence of one auditory stimulus, responding on one response lever was reinforced with food; with another auditory stimulus, responding on a second lever was reinforced. It was found that discrimination performance of one group, relative to appropriate control groups, was facilitated when electric shock was correlated with reinforcement on one lever and not on the other. Further, relative discrimination levels were found to be higher on the lever correlated with the shock than on the alternate lever. The significance of the results for operant within-S studies and for a mediational theory of shock-correlated reinforcement was discussed.