Ontogeny of the Ponzo illusion: Effects of age,schooling, and environment(1)

Subjects were 384 Moroccan males (age range 6–22 yrs.), divided into 16 equal groups, according to the factorial design: age (4) × schooling (2) × environment (2). Subjects were tested on four Ponzo configurations (differing in contextual information) from Leibowitz et al. (1969), the Ponzo perspective stimulus from Segall et al. (1966), the CEFT from Witkin et al. (1971), and a measure of pictorial depth perception. Individual measures of contact with mass-media and urban life were collected on each subject. Analyses indicated that all main factors of age, schooling, and environment played important, and differing, roles in inducing illusion susceptibility. Piaget's (1969) theory of primary and secondary illusions was found useful in understanding the results of the Ponzo configurations used in the study. Primary illusion configurations were found to be relatively insensitive to experiential variables, and illusion susceptibility decreased with chronological age. In contrast, secondary illusion configurations were affected by many experiential factors, and illusion susceptibility was mediated through perceptual development and pictorial depth perception rather than chronological age. It was concluded that single-factor theories of ontogenetic change in illusion susceptibility were inadequate to explain the complex interactions found in this study.     

Menstrual symptom questionnaire: further psychometric evaluation

Novak, Jones, and Jones (1975) state that menstrual distress (dysmenorrhea) is the greatest cause of lost work hours among women, and Kistner (1970) estimate this to be 140 million annual work hours. Thirty-five percent of female adolescents. 25% of college women, and 60–70% of single females in their 30's and 40's are said to be invalid during menstruation (Green, 1971). Treatment procedures for primary dysmenorrhea have included hypnosis (Lackie, 1964), physical exercises (Golub. 1959). natural childbirth techniques (House, 1969), and oral contraceptives.

Though hormones are the most recent, frequent and effective treatment approach (Novak et al. 1975). Tyler (1973) cautions against their use because of possible adverse side effects. Recently, systematic desensitization (SD) has been used to relieve menstrual distress (Mullen, 1968, 1971; Reich, 1972; Tasto and Chesney, 1974) without risk of such side effects. Although SD has been effective, considerable response variability has been noted.

Becuase of this variability. Chesney and Tasto (1975a) developed the Menstrual Symptom Questionnaire (MSQ) to psychometrically identify two types of primary dysmenorrhea: spasdomic dysmenorrhea which designates distress during the flow period associated with excessive muscle tension, and congestive dysmenorrhea referring to premenstrual tension related to water retention. This instrument was designed to define types of menstrual symptoms and not symptom severity. Test-retest reliability was 0.87 and discrimination between spasdomic and congestive dysmenorrhea was highly significant. Of 48 women tested. 29 were identified as spasdomic with MSQ scores between 82 and 102, while 19 scored in the congestive range (46–68). Interestingly, no women scored in the median range (69–81), suggesting that there exists two unique types of primary dysmenorrhea identifiable by the MSQ. Subsequently, Chesney and Tasto (1975b) reported that congestive women did not respond to SD, while spasdomic symptoms were significantly reduced. It was hypothesized that the relaxation training component of SD was effective with spasmodic muscle tension symptoms and ineffective with congestive water retention symptoms. Consequently, the MSQ was thought capable of accounting for previously reported response variability of primary dysmenorrhea to SD.

The present study was intended to replicate Chesney and Tasto's (1975a, 1975b) findings. The following Null hypotheses were tested; (a) the MSQ does not have significant test-retest reliability; (b) the congestive-spasmodic symptom dimension of the MSQ is not dichotomous; and (c) the MSQ does not predict SD effectiveness     

Measuring circadian cycles: A simple temperature recording preparation

While measurement of temperature as an index of circadian rhythmicity is not a difficult task with infrahuman subjects, long-term monitoring of deep body temperature with human subjects poses numerous measurement and safety problems. A preparation is described that is highly accurate, inexpensive, chronic, comfortable, and eliminates safety problems associated with more traditional methods of temperature measurement.     

The effect of aversive consequences upon persistent behavior

It was hypothesized that if a behavior is freely engaged in with the expectancy that an aversive consequence will follow, the intrinsic motivation to perform that behavior will increase when the aversive consequence is no longer present. Subjects either worked on a list of anagrams while receiving electric shock on a VR schedule, while being threatened by electric shock, or in the absence of shock. The experimenter then left the subject alone for 10 minutes with a new list of anagrams. Subjects in the shock condition solved more anagrams on the posttest than subjects in the threat-of-shock and noshock conditions. Subjects in both the shock condition and the threat-of-shock condition reported that they spent more of their free time on the anagrams than subjects in the no-shock condition.