Infant responses of ocular fixation to moving visual stimuli

Infants of 1, 2, and 3 months of age were presented with two checkerboard patterns, one stationary and the other moving in a horizontal oscillatory motion at one of eight rates. An observer who could see only the infant's head and eyes recorded, for each 30-sec trial, (a) the position of first fixation, (b) position of fixation at the end of each 5-sec interval, and (c) a final forced-choice judgment of the position of the moving stimulus. Results showed reliable differences in ocular behavior as a function of rate of stimulus motion for all three groups of infants.     

Perceptions of sex-role stereotyped dimensions in cotherapists with an examination of experimenter effects

Observers' impressions of sex-role stereotyped dimensions of videotyped pairs of male and female cotherapists were examined in two conditions of dominance: male-dominant pairs and female-dominant pairs. Sex of experimenter effects were also studied. Results indicated that sex-role stereotyping was a function of behavior, not biological sex. Support was found for the conceptualization of masculinity and femininity as independent dimensions. Observer sex differences indicated less favorable impressions with same-sex dominance. Sex of experimenter effects were not found, but may subtly influence results in sex-role research.An earlier version of this paper was presented at the 50th annual meeting of the Eastern Psychological Association, Philadelphia, PA. April 1979. The author wishes to thank Barbara B. Bunker, Norman Epstein, and Joseph Masling for their support and thoughtful suggestions concerning this project.     

Child, Family and Case Characteristics: Links with Service Utilization in Physically Abused Children

We investigated the relationships between child, familial, and case characteristics and mental health and medical health care service utilization by physically abused children. Participants included 26 parents or caregivers of 37 Medicaid-eligible children who had substantiated cases of physical abuse. Children whose female caregivers reported a greater number of stressors were more likely to receive mental health care. Furthermore, children not living with the maltreating caregiver were more likely to receive medical health care services. Results are discussed in terms of factors that may account for these links, and the similarities of these findings with those of service utilization in general and clinical child samples.     

Regret resolution, aging, and adapting to loss

Both theory and empirical evidence suggest that people who have unresolved regrets experience lower levels of well-being than do those who resolve their regrets. In this study, the authors examined the role of regret resolution during bereavement by assessing whether (a) regret resolution would aid in adapting to the death of a loved one and (b) older adults would be more successful at resolving their bereavement-related regrets than would younger adults. Mixed models were run with longitudinal data from an age-heterogeneous sample of 147 men and women who were eventually bereaved after providing care for a loved one through a hospice. As expected, regret resolution contributed to adjustment as indicated by postloss patterns of depressive symptoms, well-being, and rumination; further, older adults were more likely to resolve their regrets than were younger adults. Implications for encouraging regret resolution early in bereavement are discussed.     

Gist-based memory for prices and “better buys” in younger and older adults

Ageing typically leads to various memory deficits which results in older adults’ tendency to remember more general information and rely on gist memory. The current study examined if younger and older adults could remember which of two comparable grocery items (e.g., two similar but different jams) was paired with a lower price (the “better buy”). Participants studied lists of grocery items and their prices, in which the two items in each category were presented consecutively (Experiment 1), or separated by intervening items (Experiment 2). At test, participants were asked to identify the “better buy” and recall the price of both items. There were negligible age-related differences for the “better buy” in Experiment 1, but age-related differences were present in Experiment 2 when there were greater memory demands involved in comparing the two items. Together, these findings suggest that when price information of two items can be evaluated and compared within a short period of time, older adults can form stable gist-based memory for prices, but that this is impaired with longer delays. We relate the findings to age-related changes in the use of gist and verbatim memory when remembering prices, as well as the associative deficit account of cognitive ageing.     

Development of selective attention: perceptual load influences early versus late attentional selection in children and adults

The moderating effect of perceptual load on visual selective attention was examined in 2 studies. In Study 1, children and young adults searched displays of varying set size flanked by irrelevant distractors. Children's performance was as efficient as adults' under conditions of high but not low loads, suggesting that early selection engages rapidly maturing neural systems and late selection engages later-maturing systems. In Study 2, 4 age groups were tested, and place markers were set at empty locations to examine perceptual grouping effects. Study 1's pattem was replicated in all age groups, with onset of early selection occurring at lower loads for younger children. Overall, children initiated early selection at lower loads to compensate for immature anterior-system interference control processes.     

The role of graded category structure in imaginative thought

Participants generated lists of exemplars from the categories of animals, tools, and fruit, and their lists were used to determine the relative accessibility of individual exemplars. Measures of accessibility included output dominance (the number of participants who listed an exemplar), rank (how early instances were listed), and two scores that reflect their combination-output precedence and dominance/rank. Other participants drew and described novel exemplars of those categories that might exist on an imaginary planet and reported on the factors that influenced their creations. References to Earth animals, tools, or fruit were used to determine imagination frequency (the number of participants who mentioned relying on particular Earth exemplars). Items high in accessibility were also high in imagination frequency, implying that those items that come to mind most readily are the ones most likely to serve as starting points for the development of novel ideas. This result held even when task constraints weighed against the use of such items (Experiment 2) and when participants were encouraged to be as creative as possible (Experiment 4), suggesting that it is difficult to avoid the influence of highly accessible category exemplars. Other measures of category structure, including the rated typicality, familiarity, and frequency of exemplars, did not predict imagination frequency as well. The results are discussed in terms of expanding concept boundaries and the inadvertent application of knowledge that is readily accessible.     

Methods for obtaining menstrual-cycle data in menstrual-synchrony studies: commentary on Schank (2001)

J. C. Schank (2001) claimed to identify 2 categories of error-measurement error and recall biases-in the methodology used in studies of menstrual synchrony. This commentary focuses on the 2nd of these, recall biases, and other errors that he argued may result from "allowing participants to fill out menstrual-cycle-onset calendars" (p. 3). J. C. Schank's detailed discussion of various types of recall biases is inappropriate and misleading given that the majority of menstrual-synchrony studies have used prospective menstrual calendars. The use of menstrual calendars is a well-accepted method in a number of research areas and demands little of participants. J. C. Schank questioned the validity of menstrual calendar data on the basis of assumptions about recall bias for which he had no evidence.     

2.5-year-olds use cross-situational consistency to learn verbs under referential uncertainty

Recent evidence shows that children can use cross-situational statistics to learn new object labels under referential ambiguity (e.g., Smith & Yu, 2008). Such evidence has been interpreted as support for proposals that statistical information about word-referent co-occurrence plays a powerful role in word learning. But object labels represent only a fraction of the vocabulary children acquire, and arguably represent the simplest case of word learning based on observations of world scenes. Here we extended the study of cross-situational word learning to a new segment of the vocabulary, action verbs, to permit a stronger test of the role of statistical information in word learning. In two experiments, on each trial 2.5-year-olds encountered two novel intransitive (e.g., "She's pimming!"; Experiment 1) or transitive verbs (e.g., "She's pimming her toy!"; Experiment 2) while viewing two action events. The consistency with which each verb accompanied each action provided the only source of information about the intended referent of each verb. The 2.5-year-olds used cross-situational consistency in verb learning, but also showed significant limits on their ability to do so as the sentences and scenes became slightly more complex. These findings help to define the role of cross-situational observation in word learning.