Brain-stimulation intensity, rate of self-stimulation, and reinforcement strength: an analysis through chaining

Reinforcement strengths of different intensities of brain stimulation were assessed by means of a two-member behavioral chain. A variable interval schedule of 30 sec was the first-member, and five lever presses, each rewarded with stimulation, was the second. It was found that response rate on the VI schedule continued to increase beyond the intensity value which produced peak rate on the second-member, self-stimulation lever. It was concluded (1) that brain-stimulation reinforcement strength cannot be assessed adequately by means of self-stimulation rate, and (2) the chaining technique employed in the present experiment appears promising as an analytical tool in brain-stimulation research. Finally, some aspects of the data suggested a fatigue or stimulation-adaptation phenomenon.     

Effect of CER on DRL responding

The effect of CER on DRL 16 was studied in four rats. All Ss showed complete CER suppression after five CER trials, together with some unconditioned post-shock suppression. This post-shock suppression showed complete recovery in all Ss after 10 days of five CER trials per day, but complete CER suppression continued throughout.     

Does Religious Belief Matter for Grief and Death Anxiety? Experimental Philosophy Meets Psychology of Religion

It is commonly reasoned that religious belief moderates death anxiety and aids in coping with loss. However, a philosophical perspective known as meta‐atheism includes the claim that avowed religious believers grieve deaths and experience death anxiety as intensely as avowed atheists. Thus, we report a study comparing religious believers and nonbelievers on measures of death anxiety and grief. We further investigated the relationships between certain religious beliefs (views of God, afterlife belief, religious orientation) and death anxiety, as well as both painful grief reactions and grief‐related growth. We surveyed 101 participants across the United States, ranging in age (19 to 57), education, and ethnicity. Participants avowing some form of religious belief, in comparison to those not, did not demonstrate lower levels of death anxiety. They did, however, display higher levels of a certain type of death acceptance. Additionally, those professing belief reported less grief and greater growth in response to loss. Greater afterlife belief was not associated with less grief; however, it was associated with both greater grief‐related growth and lower death anxiety.     

Profiles of commitment in standard and fixed-term employment arrangements: Implications for work outcomes

This paper develops and tests a framework for understanding the relative importance and predictive efficacy of commitment to one’s profession, organization, supervisor and job in both standard and fixed-term employment arrangements. Drawing from the commitment and employment arrangement literatures, we test a set of hypotheses identifying distinct patterns of commitments (i.e., commitment profiles) to these four targets that should yield desired work-related outcomes in standard and fixed-term employment arrangements. We test our hypotheses using latent profile analysis on data collected from two Finnish universities (N1 = 235, N2 = 233). A high macro profile, characterized by high commitment to profession, organization and job, and moderate commitment to supervisor, emerged for employees in standard employment relationships, and this profile was associated with significantly higher positive work behaviours and work effort and lower turnover intentions than the other profiles. For employees with fixed-term employment contracts, a high cosmopolitan profile emerged, characterized by high commitment to the profession and job and low commitment to the organization and supervisor. For these employees, this profile was associated with positive work behaviours and work effort comparable to the high macro profile. Implications for theory, research and practice are discussed.     

Book Reviews: Imagined Human Beings,by Bernard J. Paris,Yale University Press, 1997, 336 ps

The American Journal of Psychoanalysis -     

Parents' convergence on sharing and marital satisfaction,father involvement,and parent–child relationship at the transition to parenthood

This study examines determinants of father involvement, the parents' convergence on marital satisfaction, and mothers' and fathers' interactive behavior in dual‐earner families at the transition to parenthood. Sixty dual‐earner Israeli couples and their five‐month‐old firstborn child were interviewed and videotaped in infant–mother and infant–father interactions. Interactions were coded globally for 21 interactive behaviors and composited into measures of parent sensitivity and infant readiness to interact. Five determinants of each parent's involvement in house and childcare were assessed as predictors of parent–infant interactions: the sharing of household and childcare responsibilities, the amount of time each parent spends with the infant during the week and on weekends, and the range of childcare activities the parent typically performs. Marital convergence was indexed by the absolute difference score between mothers' and fathers' marital satisfaction. Father sensitivity was related to the sharing of household and childcare responsibilities, to the amount of time the father spends with the child on weekends (but not during the week), to the range of childcare activities father performs, and to marital convergence. Mother sensitivity was related only to the sharing of responsibilities between spouses. The range of the father's childcare activities predicted maternal interactive sensitivity. Infant readiness to interact with the father, but not with the mother, was related to the sharing of childcare responsibilities, to the range of father's childcare activities, and to marital convergence. Results further specify the differential associations between the marital and the parent–child relationship for mothers and fathers and point to the importance of the father's instrumental involvement in childcare to the development of fathering. © 2000 Michigan Association for Infant Mental Health.     

Affect regulation and synchrony in mother—infant play as precursors to the development of symbolic competence

This study examines relationships between organizing processes of affective communication in infancy and the development of symbolic competence. Thirty six mother—infant dyads were observed at 3 and 9 months, and 32 dyads were reassessed at 24 months. Mother's and infant affective states during face-to-face play at 3 and 9 months were coded in .25-second frames. The underlying structure of infant affect and the time-lag synchrony between mother and infant affective states were assessed with time-series analyses. In addition, interactions at 3 and 9 months were assessed for the global level of infant positive affect and maternal affect attunement. At 2 years, three dimensions of symbolic competence were evaluated: symbolic play, verbal IQ, and the child's use of internal states words. Infant affect regulation at 3 months, defined by the existence of a non-random, stochastic-cyclic organization of affective states, predicted all three domains of symbolic competence at 2 years. Maternal synchrony and attunement each had an independent contribution to the prediction of symbolic play and internal state talk. The microanalytic and global indices of affect each added meaningfully to the prediction of symbolic functioning. The organization of behavioral sequences into coherent affective configurations is discussed as a possible precursor to the general capacity to develop symbols. © 1997 Michigan Association for Infant Mental Health     

Making sense of agency: Belief in free will as a unique and important construct

Belief in free will is the general belief that human behavior is free from internal and external constraints across situations for both self and others. In the last decade, scholars in social‐cognitive psychology and experimental philosophy have made progress in defining free will terms, exploring how laypersons think of free will, discovering related cognitive processes and biases, and examining the behavioral outcomes of believing in free will. The growing interest in this construct raises the need for a discussion of what is new about free will beliefs, and how this construct differs from and relates to other well‐known agency constructs in the literature. In this review, we integrate conceptual discussions and empirical findings in the existing literature to highlight the belief in free will as a separate and important construct, different from existing constructs in the literature, and capturing unique aspects of agency. We conclude by calling researchers to recognize these differences and to leverage the potential in the construct of the belief in free will as a predictor of cognition and behavior.