Reconsidering the two-second decay hypothesis in verbal working memory

A common belief in the study of short-term memory is that the verbal trace decays around two seconds after it is encoded. This belief is typically assumed to follow from the finding that in immediate serial recall, the time required to rapidly articulate a span-length list is around two seconds. Empirically, this belief is in opposition to a broad set of findings across a number of domains that establish mean decay times to be longer than two seconds. Theoretically, the available computational and mathematical models of immediate serial recall do not address this issue directly, because they typically rely on other mechanisms in addition to decay to account for forgetting. As such, they may show that decay times can be longer than two seconds, but they fail to show that they cannot be as short as two seconds. We address the issue directly and set a lower bound on mean trace decay times, even under the limiting assumption that all forgetting is due to trace decay. We do this by presenting a simple item-based model of trace decay that allows us to estimate values of mean trace duration. For a set of words whose span-length lists can be rapidly articulated in about two seconds, the model offers a conservative estimate for their mean decay times of around four seconds. Both the experimental and theoretical evidence show that items in verbal working memory decay considerably slower than the two-second decay hypothesis claims.     

The Genetics Journey: A Case Report of a Genetic Diagnosis Made 30 Years Later

Mandibulofacial dysostosis with microcephaly (MFDM) is a rare autosomal dominant condition that was first described in 2006. The causative gene, EFTUD2, identified in 2012. We report on a family that initially presented to a pediatric genetics clinic in the 1980s for evaluation of multiple congenital anomalies. Re-evaluation of one member thirty years later resulted in a phenotypic and molecularly confirmed diagnosis of MFDM. This family’s clinical histories and the novel EFTUD2 variant identified, c.1297_1298delAT (p.Met433Valfs*17), add to the literature about MFDM. This case presented several genetic counseling challenges and highlights that “the patient” can be multiple family members. We discuss testing considerations for an unknown disorder complicated by the time constraint of the patient’s daughter’s pregnancy and how the diagnosis changed previously provided recurrence risks. Of note, 1) the 1980s clinic visit letters provided critical information about affected family members and 2) the patient’s husband’s internet search of his wife’s clinical features also yielded the MFDM diagnosis, illustrating the power of the internet in the hands of patients. Ultimately, this case emphasizes the importance of re-evaluation given advances in genetics and the value of a genetic diagnosis for both patient care and risk determination for family members.     

Prayer Utterances as Aligning Actions

Social actors use prayer utterances (e.g., statements such as “prayed over,”“prayed about,” or “spent time in prayer”) as aligning actions that justify problematic or questionable courses of action and prevent possible negative characterizations. The prayer utterance functions as an aligning action in American society because of Americans’ beliefs and actions concerning the efficacy of prayer in solving problems and because prayer is viewed as a sign of personal morality and trustworthiness. Three examples of individuals who use the prayer utterance as an aligning action serve as illustrations of this argument (Oprah Winfrey, Alabama State Supreme Court Justice Sue Bell Cobb, and President Barack Obama). Scholars should investigate the uses and functions of prayer utterances in social life and should also investigate the possible uses of other religious talk as aligning actions.     

Differentiating corporal punishment from physical abuse in the prediction of lifetime aggression

Corporal punishment and parental physical abuse often co‐occur during upbringing, making it difficult to differentiate their selective impacts on psychological functioning. Associations between corporal punishment and a number of lifetime aggression indicators were examined in this study after efforts to control the potential influence of various forms of co‐occurring maltreatment (parental physical abuse, childhood sexual abuse, sibling abuse, peer bullying, and observed parental violence). College students (N = 1,136) provided retrospective self‐reports regarding their history of aggression and levels of exposure to childhood corporal punishment and maltreatment experiences. Analyses focused on three hypotheses: 1) The odds of experiencing childhood physical abuse would be higher among respondents reporting frequent corporal punishment during upbringing; 2) Corporal punishment scores would predict the criterion aggression indices after control of variance associated with childhood maltreatment; 3) Aggression scores would be higher among respondents classified in the moderate and elevated corporal punishment risk groups. Strong support was found for the first hypothesis since the odds of childhood physical abuse recollections were higher (OR = 65.3) among respondents who experienced frequent (>60 total disciplinary acts) corporal punishment during upbringing. Partial support was found for the second and third hypotheses. Dimensional and categorical corporal punishment scores were associated significantly with half of the criterion measures. These findings support efforts to dissuade reliance on corporal punishment to manage child behavior.

     

The perception and discrimination of local 3-D surface structure from deforming and disparate boundary contours

In a series of four experiments, we evaluated observers' abilities to perceive and discriminate ordinal depth relationships between separated local surface regions for objects depicted by static, deforming, and disparate boundary contours or silhouettes. Comparisons were also made between judgments made for silhouettes and for objects defined by surface texture, which permits judgment based on conventional static texture gradients, conventional stereopsis, and conventional structure-from-motion. In all the experiments, the observers were able to detect, with relatively high precision, ordinal depth relationships, an aspect of local three-dimensional (3-D) structure, from boundary contours or silhouettes. The results of the experiments clearly demonstrate that the static, disparate, and deforming boundary contours of solid objects are perceptually important optical sources of information about 3-D shape. Other factors that were found to affect performance were the amount of separation between the local surface regions, the proximity or closeness of the regions to the boundary contour itself, and for the conditions with deforming contours, the overall magnitude of the boundary deformation.     

2005 National Society of Genetic Counselors Presidential Address: Raising Our Voice

This Presidential Address was given at the annual education conference of the National Society of Genetic Counselors in Los Angeles, California, USA on November 14, 2005     

Dysfunctional isolation in the elderly: Increasing marital and family closeness through improved communication

Unique developmental crises in old age may lead to social withdrawal that negatively affects the individual and his/her marital and family relationships. Without an awareness of these aging dynamics, the therapist can inadvertently perpetuate these distancing behaviors which can exacerbate marital and family conflict. This paper discusses certain developmental crises which can result in increased isolation for the older adult, and suggests therapeutic interventions to facilitate increased closeness among family members.     

The development of moral beliefs: A retrospective study

The present study tested a model of moral belief development based on Erikson’s (1963) and McAdams’ (1989) theories of personality development. The sequence of moral belief development is beliefs about outcomes, outcome certainty, beliefs about humanity, and social concern. The developmental antecedents of these beliefs were measured using 13 rationally constructed scales based on background data items. The belief and developmental scales were given to a sample of 246 undergraduates. Using a series of hierarchical blocked regressions, we found a pattern among the beliefs that supported a stage or contingent sequence model of belief development. The results suggest that a supportive, conventional and consistent family environment is a major antecedent of beliefs about outcomes and outcome certainty. Adjustment to the demands of adult culture rather than peer culture is the major antecedent of belief about humanity and social concern. Parts of this research were supported by a grant from the U.S. Office of Naval Research (Contract No. N00014-91-J-4167), Michael D. Mumford and Theodore L. Gessner, Principal Investigators.