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961.
962.
An operant discrimination task allowing variability of reinforced response patterning 总被引:3,自引:3,他引:0 下载免费PDF全文
Five pigeons were trained to perform a discrimination task allowing variability of reinforced response patterning. The task consisted of moving a stimulus light within an 4×4 matrix of lights from the top left position to the bottom right position by pecking on two keys in succession in order to obtain a reinforcement. A peck on one key moved the light one position to the right and a peck on the other key moved it one position down. After preliminary training on alternating fixed-ratio 3 schedules of reinforcement, the birds could peck on either key in any order, but more than three responses on a key resulted in a blackout followed by the return of the stimulus light to the start position. Results indicate that initially the birds used a wide variety of response patterns to obtain reinforcement, but with continued practice, response patterns became more stereotyped. 相似文献
963.
Visual perception in the retinal degenerate C3H mouse 总被引:3,自引:0,他引:3
Z M Nagy J R Misanin 《Journal of comparative psychology (Washington, D.C. : 1983)》1970,72(2):306-310
964.
Uncertain frequency detection of brief sinusoids in noise was studied in a special Yes-No paradigm that included single-frequency trials randomly interleaved with trials on which either of two frequencies could be presented. Contrary to implications from previous studies, and to sensory filter models of attention, the Os’ deliberate attempts to impose narrow- or wide-band listening had only a small effect on the relative detectability of signals at 500 Hz and at 1100 Hz. If frequency selectivity is to be understood as sensitivity adjustment (rather than as a recognition process), the relevant parameters may be entirely stimulus determined. 相似文献
965.
966.
Winding jig and construction details aregiven for a microminiature electrode for chronic small animal work. Electrode configuration is that of intermeshed helices. Increasing the number of leads does not affect bulk or flexibility. 相似文献
967.
THE AVAILABILITY AND HELPFULNESS OF SOCIALIZATION PRACTICES 总被引:5,自引:0,他引:5
This study reports on the socialization practices most available to new employees and the extent to which these practices are seen by newcomers as being helpful in becoming effective organizational members. The results showed that socialization practices are differentially available to newcomers, and perceptions of their helpfulness vary. The helpfulness of various socialization practices as reported by newcomers appears to affect their feelings of subsequent job satisfaction and commitment. 相似文献
968.
The effects of public posting on speeding behavior on an urban highway were assessed using a reversal design. During baseline the percentage of drivers speeding was measured with a concealed radar unit. During the daily posting condition a highway sign was installed which provided feedback on the percentage of drivers not speeding yesterday and the best record to date. This sign was then covered and reintroduced. Results indicated that the sign was effective in reducing speeding behavior. Furthermore, the effects were most pronounced in reducing the speeds of the faster drivers. Next, daily and weekly postings were compared with the sign alone without numerical feedback: results revealed that the weekly posting condition was as effective as the daily posting condition, but that the sign had no influence when numbers were not posted. Finally, the weekly posting procedure remained effective during a 6-month follow-up condition. 相似文献
969.
970.
George G. R. Kunz John R. Lutzker Anthony J. Cuvo Jacquie Eddleman Sandra Z. Lutzker Deborah Megson Beverly Gulley 《Journal of applied behavior analysis》1982,15(4):521-531
Responding to administrative staff and parental concerns, using modified reversal and withdrawal designs, two experiments evaluated a staff-managed feedback system to improve the hygiene and developmental skills of children in an infant/toddler center. Experiment 1 examined feedback designed to increase staff performance in checking and changing diapers, and recording those changes. A chart plus supervisory feedback produced increases in and maintenance of staff performance. Experiment 2 compared an existing staff management system with a “playchart” plus feedback in increasing careprovider-infant stimulation. The data (with follow-up on a new staff) supported the use of the new feedback system. Questionnaire data further supported the utility of the playchart system. 相似文献