http://hdl.handle.net/1993/4423 Psychology Fri, 03 May 2013 21:14:37 GMT 2013-05-03T21:14:37Z http://hdl.handle.net/1993/18870 Title: An overlooked milestone : is age of sitting foundational in predicting age of onset of proto-declarative pointing? Authors: Lall, Debra I. K.; Eaton, Warren O. Abstract: Infant pointing to engage another’s attention demonstrates social understanding and predicts later language accomplishments. Crawling onset is thought to predict such pointing because self-locomotion facilitates perspective taking and self-initiated social engagement. Early crawlers point more than age-matched late crawlers, but this evidence for the role of self-locomotion is weakened by broad age-matching. Co-variation in the ages of onset for both crawling and pointing could also be due to shared underlying gross motor development. If locomotion is the active predictive ingredient in the crawl-point relation, the predictive potency of crawling should be largely independent of prior non-locomotor sitting onset. Longitudinally extracted ages of onset for sitting, crawling, and pointing were available for 312 infants. 30% of them did not show the expected sit-crawl-sequence, which rules out crawling as a necessary prerequisite for pointing. For the remaining 258 babies, crawling remained a significant predictor of pointing even after sitting, which was a weaker predictor, was accounted for. Self-locomotion may be important for the development of pointing, but it isn’t the sole active ingredient. Description: Poster presented at the Biennial Meetings of the Society for Research in Child Development, April 19, 2013, Seattle, Washington, USA. Address correspondence to debralall@me.com or Warren.Eaton@ad.umanitoba.ca. Tue, 16 Apr 2013 00:00:00 GMT http://hdl.handle.net/1993/18870 2013-04-16T00:00:00Z http://hdl.handle.net/1993/18792 Title: Analyzing age of milestone attainments from daily checklist recordings using SAS/STAT® procedures Authors: Eaton, Warren O.; Bodnarchuk, Jennifer L. Abstract: The ages at which children first reach developmental milestones like sitting, crawling, or walking display substantial child-to-child variability that may reveal the operation of important developmental processes. Survival analysis (also called event-history analysis) is well suited for such data because it is designed to assess time-situated events characterized by a qualitative change from one discrete state to another (e.g., from not walking to walking). Multiple definitions of state changes are possible and deserve study, but their implementation from daily recordings is computationally intensive. The SAS/STAT® procedure Expand can efficiently convert raw milestone data into a format for analysis with the SAS Lifereg procedure, one of several survival analysis procedures. This report comprises an annotated SAS program for the conversion of multiple daily checklist recordings into variously defined events suitable for input into an illustrative survival analysis. Fri, 12 Apr 2013 00:00:00 GMT http://hdl.handle.net/1993/18792 2013-04-12T00:00:00Z http://hdl.handle.net/1993/4596 Title: Online preschooler lie scale (OPLS) Authors: Froese, Kimberly A.; Eaton, Warren O.; Glenwright, Melanie Abstract: Generally viewed as a negative behavior, child lying is a cognitive accomplishment that requires awareness of others’ thinking. In developing a measure of the breadth of a child’s lie repertoire, we recruited an online, diverse, cross-cultural sample of 179 parents to answer questions about family demographics, parent personality, and the types of lies told by their child. Nine items that were internally consistent and positively correlated with age were summed to create the Online Preschooler Lie Scale score. OPLS scores’ developmental identity remained evident even in the face of many competing demographic factors. The breadth of a child’s lying repertoire is a marker for developmental advance, and it can be assessed with convenient online methods. Sat, 01 Jan 2011 00:00:00 GMT http://hdl.handle.net/1993/4596 2011-01-01T00:00:00Z http://hdl.handle.net/1993/4501 Title: Participant recruitment in an online world: using blog comments and forum posts. Authors: Eaton, Warren O.; Lewycky, Samantha T. Abstract: The recruitment of participants to online research can be difficult when they must meet restrictive requirements, a situation we faced in recruiting the parents of 2-month-olds. Here we describe a new method, blog commenting, and compare it to the more common online technique of posting recruitment information on parent-oriented online forums. In the blog method, we searched blogs for infant-specific terms and phrases; we then read entries from those retrieved blogs and identified ones written by a parent of an appropriately aged infant. We then posted to the blog a comment in which we invited the parent to participate and to visit our research web site. Rates of study completion and most participant characteristics did not differ for blog- and forum-recruited participants. We discuss the particular strengths and weaknesses of blog recruiting and conclude that it is well suited for topics that people care to write about. Sat, 01 Jan 2011 00:00:00 GMT http://hdl.handle.net/1993/4501 2011-01-01T00:00:00Z