Described are some of the applications found in teaching retarded children for the Dynalevel, an instrument which "transforms the loudness of sound into light to provide a visual check on the tone intensity. (Author/LS)

Research supported by a U.S. Office of Education grant. Complete details can be found in Final Report Project No. 6-8840.

To explore possible age differences, the first experiment assessed speed and maintenance of alertness in 5-year-olds, 8-year-olds, and adults. The second study tested the hypothesis that developmental variation in processing speed observed in some studies was attributable in part to age differences in alerting processes. (MP)

Training improves the ability of human observers to discriminate between two similar directions of motion. This gradual improvement is specific to the direction on which an observer is trained, enduring for several months. Improvement does not affect motion perception generally, nor does it depend on recognition of details of the movement. (Author)

The apprehension spans of learning-disabled and normal boys were compared by means of a forced-choice letter-recognition task involving tachistoscopic exposures of letter displays. Results of three experiments indicated that the decreased spans of apprehension observed in the first experiment for learning-disabled boys resulted either from greater…

Results of an initial experiment show that motoric imagery can produce relatively large increases in the ability of young children, as well as adults, to recall meaningful sentences. Results of a second experiment show that motoric imagery can, to some extent, facilitate free recall of word lists when visual imagery has no effect. (Author/RH)

One hundred undergraduates learned lists of high- or low-imagery nouns in one column (ungrouped) or in three columns (grouped). Grouped-list recall was significantly greater than ungrouped on the third and fourth trials. Spatial grouping seems to provide important cues which are independent of the words learned or imagery level. (Author/CM)

When two nonoperative lights were added to each of the ends of a stimulus display in a four choice reaction time (RT) task, the RTs of mentally retarded and nonretarded young adults Ss were slowed to about the same extent. (Author)

With the use of a probe-type serial memory task, hearing and deaf children matched on chronological age, IQ, and sex were randomly assigned to named, unnamed, or dactylo-kinesthetic (finger spelled) stimulus pretraining conditions and compared on subsequent recall performance. (Author/MP)

Equal CA educable mentally retarded and nonretarded adolescents stylus tracked an intermittently disappearing rotary pursuit target with no feedback, auditory feedback, and visual feedback. (Author)

Differences in response of four- to seven-month-old infants to tachistoscopically presented photographs of two human faces suggest infants were able to remember a frequently presented face from trial to trial and discriminate it from a discrepant, infrequently presented face. Findings suggest event-related brain potential (ERP) responses could…

Studies the distribution of attention to actors in a visual event and the influence of linguistic variables on attention. Naming an actor had a strong directing influence on attention in a neutral period and more limited effects on attention during and after the action. (RMH)

Third- and fifth-grade children and adults were presented with eight-item letter sequences of varied approximation to English in a tachistoscopic single report, cue delay task. (RH)