Signal-processing software for teaching and research in psychoacoustics under UNIX and X-Windows

A package of software is described that generates, analyzes, stores, and displays sampled waveforms. The package is designed for use under UNIX and includes C source code, UNIX manual pages, and tutorial documents. The programs interact via UNIX pipes using an ASCII-text data format, which enables the user to view the data in numerical form as well as through the use of plotting programs. Among many other functions, the programs can do the following: efficiently generate linearphase FIR filters with arbitrary transfer functions; generate impulse responses for rectangular rooms of specified dimensions; convolve waveforms with each other; perform Fourier transformation and inverse Fourier transformation; filter waveforms in the Fourier domain; filter waveforms according to the peripheral frequency selectivity of the human auditory system; cross-correlate waveforms; autocorrelate waveforms; synthesize complex waveforms, including vowel sounds and white noise. The software can read and write a variety of commonly used waveform file formats. The data can be plotted on an X-Window display using thegnuplot software, which has been included in the package. The complete software package is available via anonymous ftp from ftp.ihr.mrc.ac.uk in ~ftp/pub/johncu/wave.tar.Z     

Teacher ratings of children's problem and competence behaviors: Normative and parametric characteristics

Teacher-rated adjustment differences among young elementary school children from (a) a recent sample and a 1974 cohort, and (b) urban/suburban, male/female, and grade-level subgroups were examined. A problem behavior checklist (Classroom Adjustment Rating Scale) and a school competence measure (Health Resources Inventory) for 974 children from 5 urban and 5 suburban schools were completed by 101 first- to fourth-grade teachers. Children from the more current cohort were rated as significantly more maladjusted than those from the earlier sample on 8 of 10 adjustment variables. In the recent sample, girls and suburban children evidenced a greater number of school competencies and fewer problem behaviors than boys and urban children, respectively. The implications of these findings for the future use of the teacher rating scales are discussed.     

Parental history of hypertension and screening attendance: effects of wellness appeal versus threat appeal

This study examined whether the orientation of a health appeal differentially influences health beliefs and early-detection practices among young individuals who are potentially at risk. Undergraduates with and without a hypertensive parent were given printed material about hypertension and the importance of early detection framed in either a wellness or illness-threat format. The major dependent measure was attendance at a blood pressure screening during the week following the experimental session. Results showed that parental history (PH) participants were more than twice as likely to attend the screening when given a wellness message in comparison to threat. In the threat condition, PH participants also reported that hypertension was less preventable in comparison to participants without a hypertensive parent. Reported likelihood of developing hypertension was inversely related to subsequent screening attendance among PH participants only. Factors accounting for the efficacy of wellness-oriented appeals among individuals who report a family history are discussed.     

Changes in the level and quality of object relations in psychoanalysis: followup of a longitudinal, prospective study

As part of a prospective, longitudinal study of suitability for and outcome of psychoanalysis, 22 patients were evaluated for changes in the level and quality of their object relations. These patients had been accepted for supervised analysis with candidates in training by senior analysts who had diagnosed them as neurotic. The majority of these patients reported difficulties in relationships as at least one of their reasons for originally seeking psychoanalytic treatment. Prior to beginning analysis, each patient was given a battery of psychological tests. One year after the termination of analysis, the test battery was readministered and a followup interview was conducted separately with each patient and analyst. Ratings of change based on patient and analyst interviews and comparisons of psychological tests before and after treatment all showed statistically significant improvement in the level and quality of object relations for this patient group. The results of this study support what is often observed in clinical practice, that psychoanalysis has a positive effect on the level and quality of a patient's object relations.     

Brain potentials as indices of orthographic and phonological interaction during word matching

The interaction between orthographic and phonological codes in a same-different judgment task was studied by requiring subjects to decide if two visually presented words either looked alike or rhymed. Word pairs were selected from four different lists. Words rhymed and looked alike, rhymed but did not look alike, looked alike but did not rhyme, or neither looked alike nor rhymed. Reaction time and percent error increased whenever there was a conflict between the orthography and phonology of the words. The N200 component of the event-related brain potential (ERP) indicated that subjects were capable of detecting phonological differences between words within 260 ms from the presentation of a word pair. The amplitude of the N200s also varied with the degree of mismatch between words. N200s were largest when both the orthography and phonology mismatched, of intermediate amplitude when either orthography or phonology mismatched, and smallest when both orthography and phonology matched. P300 latency was consistent with reaction time, increasing whenever there was a conflict between the two codes. Taken together, behavioral measures and the ERP data suggest that the extraction of the orthographic and phonological aspects of words occurs early in the information processing sequence.     

The fundamental rule: a study of current usage

Members of the editorial boards of the Journal of the American Psychoanalytic Association, Psychoanalytic Quarterly, and Psychoanalytic Inquiry, plus selected analysts from Canada, France, and England, were asked how they presented the fundamental rule to their analysands and what considerations led to their choice of initial guidelines. Forty-nine of eight-three analysts responded to the survey. The respondents described diversity in phrasing of the fundamental rule, the time in analysis when the guidelines are given, and the reasons for the practice they follow. The method each chose appears to reflect the differing conceptions analysts have of the analytic process. Two major trends emerged: either our respondents emphasized delineating a work or functional framework or contract, or they emphasized establishing an attitude or spirit of cooperation, mutuality and work sharing. In each group respondents differed as to whether they favored minimal or more lengthy instructions. They also differed as to whether they followed a consistent approach or one tailored to the needs of the individual analysand. A source of tension lay in an inclination either to remain in the tradition set by Freud or to experiment with different phrasings and timings. The authors give their reasons for choosing to give explicit instructions, requesting associational material beyond thoughts and feelings, and describing resistance as inevitable and a potential source of insight.     

Anomalous dominance in sibling stutterers: Evidence from CT scan asymmetries, dichotic listening, neuropsychological testing, and handedness

Two left-handed siblings with developmental stuttering are comprehensively described. The methods of study included speech and language evaluation, neurological and neuropsychological examinations, dichotic listening, auditory evoked responses, electroencephalogram, and CT scan asymmetry measurements. The data from each sibling showed evidence of anomalous cerebral dominance on many of the variables investigated. The CT scan measurements showed atypical asymmetries, especially in the occipital regions. These findings support the theory that stuttering may be related to anomalous cerebral dominance, both on functional as well as structural bases. Implications of anomalous dominance and the resultant effect of hemispheric rivalry on speech fluency are discussed.