Sampling in developmental science: Situations,shortcomings, solutions,and standards

Sampling is a key feature of every study in developmental science. Although sampling has far-reaching implications, too little attention is paid to sampling. Here, we describe, discuss, and evaluate four prominent sampling strategies in developmental science: population-based probability sampling, convenience sampling, quota sampling, and homogeneous sampling. We then judge these sampling strategies by five criteria: whether they yield representative and generalizable estimates of a study’s target population, whether they yield representative and generalizable estimates of subsamples within a study’s target population, the recruitment efforts and costs they entail, whether they yield sufficient power to detect subsample differences, and whether they introduce “noise” related to variation in subsamples and whether that “noise” can be accounted for statistically. We use sample composition of gender, ethnicity, and socioeconomic status to illustrate and assess the four sampling strategies. Finally, we tally the use of the four sampling strategies in five prominent developmental science journals and make recommendations about best practices for sample selection and reporting.     

Multi- and unisensory decoding of words and nonwords result in differential brain responses in dyslexic and nondyslexic adults

The present functional magnetic resonance imaging (fMRI) study was designed, in order to investigate the neural substrates involved in the audiovisual processing of disyllabic German words and pseudowords. Twelve dyslexic and 13 nondyslexic adults performed a lexical decision task while stimuli were presented unimodally (either aurally or visually) or bimodally (audiovisually simultaneously).The behavioral data collected during the experiment evidenced more accurate processing for bimodally than for unimodally presented stimuli irrespective of group. Words were processed faster than pseudowords. Notably, no group differences have been found for either accuracy or for reaction times. With respect to brain responses, nondyslexic compared to dyslexic adults elicited stronger hemodynamic responses in the leftward supramarginal gyrus (SMG), as well as in the right hemispheric superior temporal sulcus (STS). Furthermore, dyslexic compared to nondyslexic adults showed reduced responses to only aurally presented signals and enhanced hemodynamic responses to audiovisual, as well as visual stimulation in the right anterior insula.Our behavioral results evidence that the two groups easily identified the two-syllabic proper nouns that we provided them with. Our fMRI results indicate that dyslexics show less neuronal involvement of heteromodal and extrasylvian regions, namely, the STS, SMG, and insula when decoding phonological information. We posit that dyslexic adults evidence deficient functioning of word processing, which could possibly be attributed to deficits in phoneme to grapheme mapping. This problem may be caused by impaired audiovisual processing in multimodal areas.     

Computational modeling/cognitive robotics complements functional modeling/experimental psychology

This position paper explores the possible contributions to the science of psychology from insights obtained by building and experimenting with cognitive robots. First, the functional modeling characteristic of experimental psychology is discussed. Second, the computational modeling required for cognitive robotics is described, and possible experiments with them are illustrated. Next, we argue that cognitive developmental robots, robots that “live” through a development phase where they learn about their environments in several different modes, can provide additional benefits to the science of psychology. Finally, the reciprocal interactions between computational modeling/cognitive robotics and functional modeling/experimental psychology are explored. We conclude that each can contribute significantly to the other.     

齐襄公考——从马王堆汉墓帛书谈起

公子诸儿、公子糺、公子小白同是齐僖公的儿子;诸儿因年长而继承王位,是为齐襄公。襄公俊美多才,有图强之心。他攻打鲁国,讨伐卫国,灭掉纪国,帮助卫惠公登上王位,齐国一时强盛。齐襄公和鲁桓公于桓公十八年在泺会见,鲁桓公夫人文姜随行。齐襄公复与妹妹文姜私通,并派力士彭生杀死鲁桓公。襄公做事随意,喜怒无常,最终被公孙无知杀死。公孙无知夺得齐国王位后,亦因暴虐被杀,齐桓公登上王位。襄公的功业,为桓公称霸打下坚实基础。     

大学生考试情境下的学业情绪

参加正常期末学业考试的167名大学生对自己在考前、考中、考后的9种学业情绪进行了自评。采用对应分析的方法分析了大学生在考试过程中不同阶段里学业情绪的变化。结果发现:大学生考试中的主要学业情绪有7种:愉快、自豪、希望、焦虑、羞愧、失望和厌烦,可分别以效价(X轴)和唤醒度(Y轴)来划分。各种情绪在考试过程中的变化特点为:愉快、自豪、希望在考后高于考前,而考中相对考前略有下降;焦虑和厌烦呈不断下降的趋势;羞愧和失望随考试的进行而升高,失望在考后达到最高。此外,考试成绩低分组学生的各种消极情绪均明显多于其他学生;希望和考前焦虑存在明显的性别差异;学习兴趣高的学生成绩优秀,考试时的愉快情绪多,厌烦情绪少。     

Motivational dynamics in the development of career attitudes among adolescents

Super (1990) proposed that the psychological determinants of career development attitudes are time perspective, self-esteem, and causal attributions. The present study analyzed the effects of these determinants on the career development attitudes of 320 students from grade 9 and 300 students from grade 12. The analysis of the data using structural equations modeling (LISREL) showed both similarities and differences in the effects of the determinants of career attitudes between the two grade levels. The results are discussed in the context of the career maturity model.     

Developmental relationships and managerial promotability in organizations: A multisource study

Managers are now focusing on developmental relationships by providing career-related mentoring to their direct reports, but research is lacking in showing whether such mentoring is in fact related to outcomes that benefit the manager. This study investigates whether self- and direct report ratings of the extent to which focal-managers provide career-related mentoring are associated with perceptions of their promotability as perceived by their bosses (n = 1623) and peers (n = 1597). Results of hierarchical regression indicated that both self- and direct report ratings of focal-managers' career-related mentoring were significant and positively related to boss and peer ratings of focal-managers' promotability. Within a self-other rating agreement framework, results of polynomial regression indicated that higher ratings of career-related mentoring by focal-managers and their direct reports were positively related to both boss and peer ratings of focal-managers' promotability. Furthermore, underrating (i.e., when self-ratings are lower than direct report ratings) was more positively related to promotability than overrating (i.e., when self-ratings are higher than direct report ratings).     

Neighborhoods as a Developmental Context: A Multilevel Analysis of Neighborhood Effects on Head Start Families and Children

Neighborhoods have been recognized in theory and research as an important context for child development. This study used data from the Head Start Family and Child Experiences Survey (FACES) and Census 2000 to assess the underlying factor structure and impact of neighborhood factors on child cognitive and behavioral outcomes, including the critical family and social factors that may mediate and/or moderate these relationships. Factor analyses found five factors described Head Start neighborhoods. After controlling for family and child factors, multilevel analyses found significant direct effects of neighborhood factors on Head Start children’s cognitive and behavioral outcomes. There were no mediation effects found for family or social variables between neighborhood factors and child outcomes. A large number of moderation effects were found although there was not a clear pattern to the results. Future research, policy, and practice implications are discussed.     

Developmental stimulation in child care centers contributes to young infants’ cognitive development

This study examined whether the quality of caregiver behavior in child care centers contributes to infant cognitive development at 9 months of age. Sixty-four infants (34 boys) were observed with their primary caregivers in child care centers at 3, 6, and 9 months of age. Caregiver behavior was rated for sensitivity and for stimulation of infant development during one-to-one caregiving interactions. Infant cognitive development was assessed using the Bayley Scales of Infant Development-II (Mental Development Index). Higher levels of developmental stimulation in the centers predicted higher levels of infant cognitive development at 9 months, beyond infant cognitive development at 3 months (just before entering child care), parental education, and maternal sensitivity. The results suggest that even small increases in developmental stimulation provided in child care centers in the first year of life may foster infants’ cognitive development.     

Conceptualizing the role of early experience: Lessons from the Minnesota longitudinal study

We draw upon data from a prospective, longitudinal study to evaluate the role of typically occurring variations in early experience on development from birth to adulthood. Such an evaluation is complex for both methodological and conceptual reasons. Methodological issues include the need to control for both later experience and potentially confounding third variables, such as IQ or temperament. Conceptual complexity derives from the fact that the effects of early experience can be both direct and indirect, can interact with other factors, and because whether an effect is found depends on what early experience and what outcomes are assessed. Even direct effects are probabilistic and are more in evidence with cumulative than with single measures. Often early experience has its effect indirectly by initiating a chain of events, by altering the organism in some way, and/or by promoting the impact of later experience. We provide examples where early experience is moderated and mediated by other factors and where it shows latent effects following developmental change. We illustrate developmental processes through which early experience has its effect and conclude that despite the complexity of development variations in early experience retain a vital place in the study of development.