Intermittent stimulation of binocular disparatecolors and central color fusion

Two experiments were conducted to determine the relationships between the various parameters of intermittent stimulation and the occurrence of binocular color fusion. Numerous combinations of on and off durations were presented, some synchronously and some asynchronously. Three Os were asked to report all colors experienced during the 15-sec viewing period. Experiment ] showed that fusion can be reliably obtained with on durations of less than 100 msec in combination with off durations of more than 100 msec. Experiment 2 indicated that the limit of dichoptic onset asynchrony within which color fusion reliably occurs is 25 msec. Two possible alternative hypotheses consistent with the data are discussed.     

Performance of two species of quail on basic reinforcement schedules

Two bobwhite quail (Colinus virginianus) and two Japanese quail (Coturnix coturnix japonica) were trained to peck a response key to obtain food. In general, performance on fixed ratio 20 and variable- and fixed-interval 60-sec schedules was comparable to the response patterns of other species under these schedules.     

A test of sex differences in instrumental appetitive learning by rats

A total of 48 laboratory rats, half male and half female, were trained and extinguished on instrumental bar-pressing for either 16% or 64% sucrose incentives. No consistent sex differences were found in either acquisition or variability of bar-press responding, or in extinction. The only statistically reliable difference indicated that males were more variable in responding for the 16% sucrose incentive, as measured by the range of scores over each week. It is concluded that no real sex differences in learning proficiency obtain under the experimental conditions employed, and that therefore the practice of using mainly or exclusively female rats in our laboratory is methodologically sound.     

Parents’ Experiences of Nonsuicidal Self-Injury Among Adolescents and Young Adults

We assessed the impact of adolescent nonsuicidal self-injury (NSSI) on parents in two studies. In Study 1, 16 Australian parents of adolescents with a history of nonsuicidal self-injury responded to open-ended questions about their child’s nonsuicidal self-injury. Data from 10 of the adolescents were matched with parents’ responses regarding the nature and extent of nonsuicidal self-injury, revealing that parents underestimated the frequency of nonsuicidal self-injury, the age of onset, and the likelihood their child would continue to self-injure. In Study 2, 22 American parents of adolescents with a history of nonsuicidal self-injury participated in interviews about their experiences. Parents in both studies reported changes in the parent–adolescent relationship after self-injury, which posed challenges to the family unit. When professional help had been sought, experiences were largely negative. Results support further investigation into family-based interventions to equip parents with tools to better relate to, and communicate with, their adolescent following self-injury. Results also suggest that mental-health professionals and general practitioners may require further training for nonsuicidal self-injury.     

The Wheel of Wellness Counseling for Wellness: A Holistic Model for Treatment Planning

A holistic model of wellness and prevention over the life span was presented by T. J. Sweeney and J. M. Witmer (1991) and J. M. Witmer and T. J. Sweeney (1992). Recent advances in research and theory related to wellness support modifications of the original model. The foundation for the model is examined, research related to each component is explored, and implications for use of the model as a basis for counseling interventions are presented.