Effect of unstressed affixes on stress-beat location in speech production and perception

The present study examined the influence of unstressed prefixes and suffixes upon the location of stress-beats in the production and perception of stressed CVC syllables. Analysis indicates that the addition of an unstressed suffix produces a small stress-beat shift, while the addition of an unstressed prefix produces a much larger shift in the opposite direction.     

Effect of lexical status on phonetic categorization

To investigate the interaction in speech perception between lexical knowledge (in particular, whether a stimulus token makes a word or nonword) and phonetic categorization, sets of [bVC]-[dVC] place-of-articulation continua were constructed so that the endpoint tokens represented word-word, word-nonword, nonword-word, and nonword-nonword combinations. Experiment 1 demonstrated that ambiguous tokens were perceived in favor of the word token and supported the contention that lexical knowledge can affect the process of phonetic categorization. Experiment 2 utilized a reaction time procedure with the same stimuli and demonstrated that the effect of lexical status on phonetic categorization increased with response latency, suggesting that the lexical effect represents a perceptual process that is separate from and follows phonetic categorization. Experiment 3 utilized a different set of [b-d] continua to separate the effects of final consonant contrast and lexical status that were confounded in Experiments 1 and 2. Results demonstrated that both lexical status and contextual contrast separately affected the identification of the initial stop. Data from these three experiments support a perceptual model wherein phonetic categorization can operate separately from higher levels of analysis.     

Binocular summation of equal-energy flashes of unequal duration

To determine if binocular summation occurs when increment flashes are of equal energy (Bloch’s law) but unequal in luminance-duration parameters, three Ss made temporal forced-choice judgments: (1) monocularly, (2) binocularly when the flashes to each eye were identical, (3) binocularly when the flashes to each eye were of equal energy but different in terms of their luminance and duration parameters, and (4) binocularly when flashes to each eye were separated by 100 msec. Binocular detection rates were consistently superior to monocular detection rates. Similarity in performance between Conditions 2 and 3 indicates that the binocular visual system responds only to the total energy of each monocular flash. The data from two Ss reveal that binocular performance was greater than that predicted on the basis of probability summation.     

Analyzing spoken language into words,syllables, and phonomes: A developmental study

Fifty children aged 3–7 years were asked to repeat spoken sentences and then to divide up these sentences into words, the words into syllables, and the syllables into speech sounds. There was a clear developmental progression in the ability to analyze spoken language in this way. The skills of analyzing sentences into words and words into syllables were highly related. Items requiring analysis of syllables into phonemes were highly correlated with each other and somewhat independent of sentence and word analysis items. The results are related to Gibson's model of reading, in which the acquisition of grapheme-phoneme correspondences is a crucial process.     

Prejudice against women: A new perspective

Studies 1 and 2 of this paper were designed to reexamine the assumption that women and men are prejudiced against women. Subjects were 50 college women, 40 college men, 40 high-school women and 40 high-school men who were presented with four employment applications for evaluation. The names referring to the gender of the applicants were manipulated so that half of the subjects were shown the two most qualified applicants as female and the two least qualified as male. The other half of the subjects were shown the reverse of this. The results for this factor, with women subjects, revealed that the sex of the applicants did not interfere with or distort the subject's judgments (p>.25). The men subjects did not show a preference for or a prejudice against applicants of either sex (p>.05). The qualifications of the applicants were selected according to each subject's previous ranking of 10 job-related characteristics. The results for this factor, with women subjects, indicated a significant difference between the subjects' ranking of the characteristics and their final selection of the applicants (p<.05). The men subjects showed no significant difference between the subjects' rankings of the job-related characteristics and their rating of the applicants (p>.05). No significant interaction between factors was found for either population of subjects (p>.05). This research reflects changing attitudes of women towards women and provides new insights regarding men's attitudes toward their own sex.The authors of this paper would like to extend our sincere gratitude to Dr. John Schaeuble for his continuous support of this research endeavor.     

Sex-role attitudes as predictors of contraceptive use among unmarried university students

Through a review of existing theory and research a set of propositions explaining contraceptive behavior among unmarried young women was developed. The paper tests the propositions with survey research data drawn from a stratified random sample of male and female students at a large Midwestern university. Findings suggest that nontraditional sex-role-related attitudes in conjunction with an internal locus of control orientation are predictive of effective contraception for women respondents. Neither variable alone or jointly explained contraceptive behavior of men respondents.Revised version of a paper presented at the annual meeting of the National Council on Family Relations, Salt Lake City, August 20–23, 1975. The research upon which this paper is based was performed pursuant to National Institute of Mental Health Grant No. RO3 MH26526-01. The author wishes to acknowledge the Bowling Green State University Faculty Research Committee and the Department of Sociology for their assistance in the early stages of this study.     

Depth separation and lateral interference

In four experiments, the perceptual interaction between an annulus and a Landolt C enclosed within it was investigated as a function of their perceived relative depth positions and of the perceived lateral distance between the inner edge of the annulus and the outer edge of the C. To permit facile and unconfounded manipulation of perceived depth, the stimuli were stereoscopic contours formed from dynamic random-lement stereograms. Either one or both stimuli were visible continuously. The effect of the annulus on the Landolt C was assessed by forced-choice recognition thresholds of the C and by judgments of its apparent clarity. The main results were: (1) For both threshold recognition and apparent clarity, perceived depth separation has a strong effect on the strength of perceptual interaction; (2) the effect is asymmetrical in that the stimulus perceived as in front of its partner and closer to the observer has greater perceptual potency; and (3) as spacing between the elements increases, perceptual interaction declines independently of depth position. The implications of these data for general theories of stimulus interaction in three-dimensional space are discussed.     

Further developments in binocular summation

This paper reviews experiments that bear on the issue of binocular summation, the superiority of binocular over monocular viewing on various visual tasks covering studies published since the appearance of a previous review of this literature by Blake and Fox (1973). The experiments are grouped into three main categories—those that deal with the specificity of binocular summation (i.e., the extent to which inputs to the two eyes must coincide spatially and temporally), those that study binocular summation on suprathreshold tasks, and those that correlate binocular summation with other aspects of binocular function. The last section of the paper critically reviews several models of binocular summation.