Baby Wordsmith

ABSTRACT— How do infants acquire their first words? Word reference , or how words map onto objects and events, lies at the core of this question. The emergentist coalition model (ECM) represents a new wave of hybrid developmental theories suggesting that the process of vocabulary development changes from one based in perceptual salience and association to one embedded in social understanding. Beginning at 10 months, babies learn words associatively, ignoring the speaker's social cues and using perceptual salience to guide them. By 12 months, babies attend to social cues, but fail to recruit them for word learning. By 18 and 24 months, babies recruit speakers' social cues to learn the names of particular objects speakers label, regardless of those objects' perceptual attraction. Controversies about how to account for the changing character of word acquisition, along with the roots of children's increasing reliance on speakers' social intent, are discussed.     

Addressing the Supply of Psychologists in the Workforce: Is Focusing Principally on Demand Sound Economics?

The growth of the psychologist workforce offers greater human capital for delivering psychological services. Workforce expansion also may contribute to excessive services or psychologists' employment concerns. Our survey revealed that interns and Internship Directors perceive the supply and demand workforce imbalance as one of the most important problems, and possibly the most challenging problem, facing professional psychology in the next decade. Organized psychology has predominantly focused on options for approaching workforce imbalances by exploring avenues for increasing the demand for psychologists' services and broadening the scope of their professional activities. Additional attention to moderating the supply of psychologists and current training levels is perceived as an important and potentially more successful means of addressing imbalances between the workforce supply and the demand for psychologists' services. Internship directors were pessimistic about the impact of most of the resolutions of the 1997 Supply and Demand Conference in addressing workforce imbalances.     

Beyond beliefs: Challenging obsessive thoughts and compulsive behaviours within a collaborative counselling relationship

Three clients with obsessive‐compulsive disorder were studied using a multiple case study approach. Clients' experiences of cognitive‐behavioural therapy, in particular the impact of having their beliefs challenged, and their responses to self‐monitoring tasks and behavioural experiments were investigated. Data included case notes made during therapy, pre‐ and post‐therapy questionnaires, and post‐therapy semi‐structured interviews. Qualitative analysis of the data identified clients' obsessive beliefs, general negative beliefs and meta‐cognitive beliefs, and explored any post‐therapy changes in these beliefs. The results demonstrated similarities between cases in obsessive beliefs (e.g. inflated responsibility for harm), general negative beliefs (e.g. feelings of failure), meta‐cognitive beliefs (e.g. the need to control thoughts) and affect (e.g. guilt). Questionnaire data from all three clients suggested no clinically significant post‐therapy changes in general negative beliefs and meta‐cognitive beliefs. However, idiosyncratic changes in obsessive beliefs were reported during therapy and at post‐therapy interview, and clients reported improved functioning and decreased levels of distress during therapy and at interview. Responses to challenge were uniformly positive, but reactions to self‐monitoring and behavioural experiments varied across cases. The implications of these findings for the treatment of obsessive‐compulsive disorder using cognitive behavioural techniques are discussed.     

Physical home environment is associated with prefrontal cortical thickness in adolescents

Biologically embedded experiences alter developmental trajectories in ways that can influence health, learning, and/or behavior. These systematic differences in experiences may contribute to different biological outcomes as individuals grow and develop, including at the neural level. Previous studies of biologically embedded experiences on neurodevelopment have focused on large‐scale institutional or economic factors (e.g. socioeconomic status [SES]) and psychosocial factors (e.g. caregiving behavior). Less attention has focused on how the quality of the immediate home settings, such as the physical home environment (PHYS), influences neurodevelopment. Moreover, no study has investigated these effects in adolescents, who undergo significant physical maturation and neurodevelopment that may influence how they respond to their physical environments. The goal of the current study was to examine whether PHYS quality is biologically embedded in the developing adolescent brain as evidenced by cognitive achievement and cortical development in 56 (48% female) healthy adolescents (14–18 years (M = 16.83 years, SD = 1.17). Using in‐home assessments of the physical home environment, anatomical brain scans, and indices of academic achievement, we found that adolescents who have more physical problems in the home (e.g. structural hazards, crowding, excessive noise, poorly lit) have thinner prefrontal cortices, which was associated with lower levels of reading achievement, independent of SES and psychosocial factors. By conducting home visits to assess physical characteristics of adolescents’ home, we highlight a typically overlooked aspect of the home environment that has relevance for adolescents’ cognitive and brain development.     

Women and Counseling: A Vision for the Future

The authors who worked to prepare this special issue on women and counseling (N. L. Kees, L. A. Carlson, R. Parmley, P. Dahlen, K. Evans, A. F. Marbley, et al., 2005) offer a vision for a just, equitable, and sustainable future for all. Recommendations for individual and systemic change needed to realize this future vision are offered. Implications for the American Counseling Association and members of the counseling profession are highlighted.     

The role of specificity in the lexical encoding of participants

In addition to information about phonology, morphology and syntax, lexical entries contain semantic information about participants (e.g., Agent). However, the traditional criteria for determining how much participant information is lexically encoded have proved unreliable. We have proposed two semantic criteria (obligatoriness and selectivity) that jointly identify the participants that are lexically encoded in verbs. We tested whether one of these criteria, semantic selectivity, makes psychologically real distinctions between participant information that is lexically encoded and participant information that is not. We examined how readers integrated syntactically optional WH-constituents in filler-gap sentences when the participant information conveyed by the WH-filler was specific to a restricted class of verbs (i.e., source locations) and when it was not (i.e., event locations). Our results provide support for the role of specificity in the lexical encoding of participant information of syntactically optional constituents.     

Infants' early ability to segment the conversational speech signal predicts later language development: a retrospective analysis

Two studies examined relationships between infants' early speech processing performance and later language and cognitive outcomes. Study 1 found that performance on speech segmentation tasks before 12 months of age related to expressive vocabulary at 24 months. However, performance on other tasks was not related to 2-year vocabulary. Study 2 assessed linguistic and cognitive skills at 4-6 years of age for children who had participated in segmentation studies as infants. Children who had been able to segment words from fluent speech scored higher on language measures, but not general IQ, as preschoolers. Results suggest that speech segmentation ability is an important prerequisite for successful language development, and they offer potential for developing measures to detect language impairment at an earlier age.     

Effects of a cognitive-behavioural internet program on depression, vulnerability to depression and stigma in adolescent males: a school-based controlled trial

This study evaluated the effectiveness of a cognitive behaviour therapy Internet program (MoodGYM) for depressive symptoms, attributional style, self-esteem and beliefs about depression, and on depression and depression-vulnerable status in male youth. A total of 78 boys age 15 and 16 years were allocated to either undertake MoodGYM or to standard personal development activities. Outcomes were measured before commencement, post-program and 16 weeks post-program. There were no significant between-group differences in change scores pre- to post- or pre- to follow-up using the intention to treat sample or for participants with post- and/or follow-up data. For boys completing 3 or more modules there were small relative benefits of MoodGYM for depressive symptoms (Effect Size, ES = 0.34), attributional style (ES = 0.17) and self-esteem (ES = 0.16) at post-program, although only the effect for self-esteem was sustained at follow-up. Both groups showed improvement in their beliefs about depression at follow-up, with the control group showing a moderate relative benefit (ES = 0.40). While the numbers are small, there was a reduction in the risk of being depressed in the MoodGYM group of 9% at post-treatment compared with a slightly increased risk for the control group. The risk of being classified as vulnerable to depression reduced by 17% in the MoodGYM group at post-treatment compared with no change in risk for the control group. These reductions in risk for the MoodGYM group were not sustained at follow-up. The limitations of the study highlight several important challenges for MoodGYM and other self-directed Internet cognitive behaviour therapy programs. These include how to ensure enough of the program is received and that people who could potentially benefit access the program and continue to remain engaged with it, and how to enhance the sustainability of any benefits.     

Is knowing believing? The role of event plausibility and background knowledge in planting false beliefs about the personal past

False memories are more likely to be planted for plausible than for implausible events, but does just knowing about an implausible event make individuals more likely to think that the event happened to them? Two experiments assessed the independent contributions of plausibility and background knowledge to planting false beliefs. In Experiment 1, subjects rated 20 childhood events as to the likelihood of each event having happened to them. The list included the implausible target event “received an enema,” a critical target event of Pezdek, Finger, and Hodge (1997). Two weeks later, subjects were presented with (1) information regarding the high prevalence rate of enemas; (2) background information on how to administer an enema; (3) neither type of information; or (4) both. Immediately or 2 weeks later, they rated the 20 childhood events again. Only plausibility significantly increased occurrence ratings. In Experiment 2, the target event was changed from “barium enema administered in a hospital” to “home enema for constipation”; significant effects of both plausibility and background knowledge resulted. The results suggest that providing background knowledge can increase beliefs about personal events, but that its impact is limited by the extent of the individual’s familiarity with the context of the suggested target event.     

Effects of knowledge and development on subordinate level categorization

Children and adults with high, moderate, and low levels of dinosaur knowledge were provided with a series of tasks to determine the relative effects of knowledge and development on subordinate category extension, differentiation, and subsequent revision. As knowledge increased, individuals generated higher proportions of category underextensions and lower proportions of overextensions. Adults, but not children, who were highly knowledgeable about dinosaurs demonstrated similar patterns of extension for unfamiliar categories, suggesting that knowledge transfer is mediated by age-related strategies. Adults at all levels of knowledge were more likely to revise their category extensions than children were. The relation between intelligence and expertise in object domains is considered and a preliminary model of the effects of knowledge and development on skill at categorization is presented.