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Biomedical subjects

H F Crovitz

Publications and source records attributed to H F Crovitz.

33 records · Page 2Linked to original sources
PubMed1979

Presentation-time limits on memory retrieval.

An experiment which varied presentation-time of a list of 20 sentences relating pairs of words was done. The subjects were 94 undergraduates. Processing variations included for some groups instructions to use visual imagery, and retrieval variations included recall and matching recognition. The results indicate that variations in presentation-time are strongly related to memory retrieval. Several experiments are reviewed, and the importance of specifying presentation-time in studies of memory-retraining in brain-damaged patients is emphasized.

Adolescent↗
PubMed1979

Memory retraining in brain-damaged patients: the airplane list.

Recall failures can be traced to inadequate encoding and unfocussed retrieval search. A method is given for encouraging deep and elaborate encoding of a list of words, and two brain-damaged patients who were unable to recall the list at first, were shown to retrieve many of the words when retrieval cues were given by the examiner.

Brain Damage, Chronic↗
PubMed1979

Problems in the acquisition of imagery mnemonics: three brain-damaged cases.

The literature provides little direction on how to overcome difficulties which some brain-damaged patients have in acquiring imagery mnemonics as a memory aid during the period of anterograde amnesia. For those interested in the therepeutic usefulness of imagery mediation, we provide a detailed account of the acquisition of some mnemonic skill in three brain-damaged patients who initially failed in using visual imagery mediators to recall words lists.

Adult↗
PubMed1979

Early childhood amnesia: a quantitative study with implications for the study of retrograde amnesia after brain injury.

Measurement of retrieval of episodic memories ascribed to the various years of early childhood was made over a three-month period of search by 17 normal young adults. The distribution of episodes ascribed to various ages is described, and it is shown that the recovery of memory from early childhood tends to show features of shrinking retrograde amnesia. Methods which were used to recover very early episodes are described, and implications for the study of shrinking retrograde amnesia in brain-damaged patients are discussed.

Adult↗
PubMed1979

Television questionnaire techniques in assessing forgetting in long-term memory.

Two experiments were designed to test methodological assumptions basic to the television questionnaire technique in order to analyze its appropriateness in assessing forgetting in long-term memory. After controlling for confounding variables in the technique as it is presently used, a non-linear function of time period of television program on recognition response to that program's title was found. Reported television viewing habits had a significant effect on recognition score. The relevance of these findings in regard to the quantitative study of retrograde amnesia is discussed.

Adult↗
PubMed1977

Memory function after closed head injury: a review of the quantitative research.

Studies which provide quantitative analyses of memory function following closed head injury were reviewed. Specific issues covered include criteria for assessing post-traumatic amnesia (PTA), PTA duration, relation of PTA duration to later memory impairment, memory functions within PTA, and comparisons between PTA and other amnesic conditions. Issues associated with the assessment of retrograde amnesia were also reviewed. With regard to memory function after PTA has terminated, we described and discussed normative data, the time course of recovery, and issues related to the nature of the later memory impairment. Directions for future work which seem particularly useful from a practical and theoretical viewpoint were also considered.

Amnesia↗
PubMed1968

Visual perception and xerography.

An electrostatic copying machine was used to model the perception of simultaneous brightness contrast. Such a model may assist the study of sensory inhibition by permitting the study of complex situations as they are transformed by rules similar to those at work in neural integration.

Copying Processes↗