The objective of the present study was to follow up on hypotheses derived from earlier research on activity level as a possible mediator between environment and development. Of particular theoretical interest was the organismic specificity hypothesis, which states that early experiences differentially influence development because the impact of the environment is mediated by individual differences in the organism. Subjects were 52 15-month-old toddlers who were observed in their homes 6 times over a 4-week period. Measures of the caretaker's attention-focusing behaviors were aggregated across 4 of the visits. Measures of the child's home environment and exploratory ability were also obtained. ANOVA analyses indicated a significant interaction between activity level and intensity of stimulation in predicting both exploratory competence and total exploration. The findings provided clear support for the organismic specificity hypothesis. Implications of the results for clinical work and future research on activity level and individual differences are discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1467-8624.1989.tb03540.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Global natural history infrastructure requires international solidarity, support, and investment in local capacity.
Proc Natl Acad Sci U S A
February 2025
Museum of Natural History, University of Colorado-Boulder, Boulder, CO 80309.
Amid global challenges like climate change, extinctions, and disease epidemics, science and society require nuanced, international solutions that are grounded in robust, interdisciplinary perspectives and datasets that span deep time. Natural history collections, from modern biological specimens to the archaeological and fossil records, are crucial tools for understanding cultural and biological processes that shape our modern world. At the same time, natural history collections in low and middle-income countries are at-risk and underresourced, imperiling efforts to build the infrastructure and scientific capacity necessary to tackle critical challenges.
View Article and Find Full Text PDFEnhanced bile acid detection and analysis in liver fibrosis with pseudo-targeted metabolomics.
J Pharm Biomed Anal
January 2025
State Key Laboratory of Discovery and Utilization of Functional Components in Traditional Chinese Medicine, The MOE Key Laboratory of Standardization of Chinese Medicines, the SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines and Shanghai Key Laboratory of Compound Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. Electronic address:
Bile acids (BAs) are essential signaling molecules that engage in host and gut microbial metabolism, playing a crucial role in maintaining organismal stability. Liquid chromatography-mass spectrometry (LC-MS) is a widely employed technique for metabolite analysis in biological samples due to its high sensitivity, excellent specificity, and low detection limits. This method has emerged as the mainstream approach for the detection and analysis of BAs.
View Article and Find Full Text PDFThe perceptual effects of signal components: black sword margins are crucial for signal size discrimination in green swordtails .
Proc Biol Sci
January 2025
Centre for Ecology and Conservation, University of Exeter, Penryn, UK.
The signals that mediate mate choice can be complex, comprising multiple components, and understanding how complex signals evolve under sexual selection has been the focus of much study. However, open questions still remain about the role of the female's sensory and perceptual processes in shaping the evolution of complex signals. Male green swordtails have an elongated caudal fin that comprises colour, length and a black melanic margin; females prefer males with larger bodies, longer swords and complete black sword margins.
View Article and Find Full Text PDFEarly transcriptional effects of inflammatory cytokines reveal highly redundant cytokine networks.
J Exp Med
April 2025
Department of Immunology, Harvard Medical School, Boston, MA, USA.
Inflammatory cytokines are fundamental mediators of the organismal response to injury, infection, or other harmful stimuli. To elucidate the early and mostly direct transcriptional signatures of inflammatory cytokines, we profiled all immunologic cell types by RNAseq after systemic exposure to IL1β, IL6, and TNFα. Our results revealed a significant overlap in the responses, with broad divergence between myeloid and lymphoid cells, but with very few cell-type-specific responses.
View Article and Find Full Text PDFCellular systems that govern protein folding rely on a delicate balance of functional redundancy and diversification to maintain protein homeostasis (proteostasis). Here, we use to demonstrate how both overlapping and divergent activities of two homologous endoplasmic reticulum (ER)-resident HSP70 family chaperones, HSP-3 and HSP-4, orchestrate ER proteostasis and contribute to organismal physiology. We identify tissue-, age-, and stress-specific protein expression patterns and find both redundant and distinct functions for HSP-3 and HSP-4 in ER stress resistance, reproduction, and body size regulation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!