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Biomedical subjects

H Halpern

Publications and source records attributed to H Halpern.

34 records · Page 2Linked to original sources
PubMed1985

Word-association responses to time-altered stimuli by schizophrenic adults.

This research addressed the relationship between the speed of presentation of stimuli through the auditory and visual modalities and the number of syntagmatic and paradigmatic word-association responses of 49 chronic undifferentiated schizophrenic adults. In word-association tests administered to subjects stimuli were balanced for frequency of occurrence in written English language (frequent, infrequent), word length (long, short), abstraction level (low, medium, high), and part of speech (noun, verb, adjective). The words were presented auditorily at normal speed (equivalent to 10 phonemes per second) and at half speed (equivalent to 5 phonemes per second) speech. Words were also presented visually, using a tachistoscope, at extended fixation speed (equivalent to 1,000 msec.) and at sweep speed (equivalent to 10 msec.). More paradigmatic responses occurred on word stimuli if nouns, long, and frequently occurring presented auditorily; and if concrete, nouns, and presented slowly and visually. Results were compared to previously reported data for aphasic and normal adults, and differentiating features and clinical implications were discussed.

Adult↗
PubMed1984

Mixed olfactory neuroblastoma and carcinoma. A report of two cases.

Two cases of olfactory neuroblastoma mixed with other neoplastic elements are reported. One tumor contained foci of adenocarcinoma and of ganglioneuroblastoma in addition to an undifferentiated small cell component consistent with neuroblastoma; the other tumor histologically resembled small cell undifferentiated carcinoma with foci of squamous differentiation, but was shown by electron microscopy to be neuroblastoma. The histogenesis and treatment of mixed tumors of this type are discussed.

Adenocarcinoma↗
PubMed1984

Differential language characteristics in adult aphasic and schizophrenic subjects.

Sixty-one adult aphasic and 61 noncerebrally involved chronic undifferentiated schizophrenic subjects were tested for impairment in 10 language categories. Results indicated that the language categories of strongest differentiating value were writing of words to dictation, naming, syntax, where aphasic subjects were more impaired in all three, and relevance, where schizophrenic subjects were more impaired. To a lesser extent, other differentiating language features were auditory retention span, and overall language ability, where aphasic subjects were more impaired in both, and fluency, where aphasic subjects were less fluent. Both groups also were tested for apraxia of speech, oral apraxia, limb apraxia, time and place orientation, and ability to respond to questions containing general information.

Adult↗
PubMed1981

Work association of time-altered auditory and visual stimuli in aphasia.

A word association test was administered to a group of 32 aphasic adults and to a control group of 32 normal adults similar in age, sex, and education. Word stimuli were balanced according to frequency of occurrence in written English language usage (frequent, infrequent), word length (short, long), abstraction level (low, medium, high), and grammatical class (noun, verb, adjective). Stimuli were presented auditorily at normal speed (equivalent to 10 phonemes per sec) and at half speed (equivalent to 5 phonemes per sec) speech. When word stimuli were presented at half speed (slower), the aphasic adults but not the controls produced significantly more paradigmatic (same grammatical class) responses. Twenty aphasic subjects and twenty controls supplied association responses to words presented tachistoscopically at fixation speed (equivalent to 250 msec) and at sweep speed (equivalent to 10 msec). When word stimuli were shown for a longer time, the aphasic adults but not the controls produced significantly more paradigmatic responses. Also analyzed were paradigmatic responses to the word association test produced in relation to frequency of occurrence, word length, levels of word abstraction, and grammatical class.

Adult↗
PubMed1976

Phonemic behavior of aphasic subjects without dysarthria or apraxia of speech.

Thirty adult aphasic subjects without apraxia of speech or dysarthria were tested for their ability to produce phonemes in single test words and in spontaneous contextual speech. Results indicated that 75% of the total phonemic errors were due to a whole-word phenomenon apparently associated with faulty processing of the word rather than faulty production of the phoneme. True phonemic errors comprised 25% of the total errors or about 2% of all responses. Phoneme substitutions were by far the most frequent error (61%). Of the 30 subjects, 28 made no phonemic errors in spontaneous contextual speech. Aphasic behavior is not characterized by significant breakdown of articulatory performance. Observed patterns of error do not clearly support a phonemic regression hypothesis.

Adolescent↗