Validity and reliability of the Test of Early Reading Ability-Second Edition with preschool age children

Criterion validity and test-retest reliability across the two forms of the Test of Early Reading Ability-Second Edition were examined. 18 preschool age children, 4 boys and 14 girls, between the ages of 37 and 59 mo. (M = 48.5, SD = 7.6) were randomly administered Forms A and B as well as the sound-blending, letter-word identification, spelling, and sound-awareness reading subtests from the 2001 Woodcock Johnson-III. Correlations were moderate between the children's performance on the Test of Early Reading Ability-2 Forms A and B and their reading subtest scores from the Woodcock Johnson-III and also between Forms A and B of the Test of Early Reading Ability-2. However, Forms A and B of the Test of Early Reading Ability-2 were not clinically equivalent.     

A procedure for evaluating sensitivity to within-person change: can mood measures in diary studies detect change reliably?

The recent growth in diary and experience sampling research has increased research attention on how people change over time in natural settings. Often however, the measures in these studies were originally developed for studying between-person differences, and their sensitivity to within-person changes is usually unknown. Using a Generalizability Theory framework, the authors illustrate a procedure for developing reliable measures of change using a version of the Profile of Mood States (POMS; McNair, Lorr, & Droppleman, 1992) shortened for diary studies. Analyzing two data sets, one composed of 35 daily reports from 68 persons experiencing a stressful examination and another composed of daily reports from 164 persons over a typical 28-day period, we demonstrate that three-item measures of anxious mood, depressed mood, anger, fatigue, and vigor have appropriate reliability to detect within-person change processes.     

Children's strategies in computational estimation

We investigated strategies used to estimate answers to addition problems. Two hundred and sixteen participants (72 adults, 72 sixth graders, and 72 fourth graders) had to provide estimates of three-by-three digit addition problems (e.g., 249 + 743). The choice/no-choice method was used to obtain unbiased estimates of the performance characteristics of strategies. Results showed that (a) at all ages, the most common strategy was to round both operands down to the closest smaller decades, (b) strategy use and execution were influenced by participants' age, problem features, and relative strategy performance, and (c) age-related changes in computational estimation include changes in relative strategy use and execution, as well as in the relative influences of problem and strategy characteristics on strategy choices. Implications of these findings for understanding age-related differences in strategic aspects of computational estimation performance are discussed.     

Global positive expectancies of the self and adolescents' substance use avoidance: testing a social influence mediational model

Grounded in theories of global positive expectancies and social influences of behavior, this investigation posited a model in which global positive expectancies are related to substance use as mediated by attitudes, subjective norms, self-efficacy, and intentions. Using a cohort sample (n = 525), structural equation modeling was employed to test the hypothesized predictions of future substance use. The findings suggest that, relative to adolescents with lower global positive expectancies, adolescents with higher global positive expectancies use substances less frequently over time because of their protective attitudinal and control-oriented perceptions towards that behavior. Additionally, results from the current investigation also extend prior findings on the factor structure of global positive expectancies, suggesting these expectancies can be viewed as a second-order factor representing optimism and two components of hope-agency and pathways.     

Remarks on Gregory's “Actually” Operator

In this note we show that the classical modal technology of Sahlqvist formulas gives quick proofs of the completeness theorems in [8] (D. Gregory, Completeness and decidability results for some propositional modal logics containing actually operators, Journal of Philosophical Logic 30(1): 57–78, 2001) and vastly generalizes them. Moreover, as a corollary, interpolation theorems for the logics considered in [8] are obtained. We then compare Gregory's modal language enriched with an actually operator with the work of Arthur Prior now known under the name of hybrid logic. This analysis relates the actually axioms to standard hybrid axioms, yields the decidability results in [8], and provides a number of complexity results. Finally, we use a bisimulation argument to show that the hybrid language is strictly more expressive than Gregory's language.     

Further evidence of a robust point-of-view bias in videotaped confessions

Four experiments were conducted to test possible limits on the previously demonstrated point-of-view bias in videotaped confessions. Study 1 showed that deliberation did not eliminate the bias. Study 2 showed that forewarning did not eliminate the bias. Study 3 showed that directing greater attention to the content of the confession did not eliminate the bias. Study 4 showed that using a lengthier, case-based confession also did not eliminate the bias. Taken together, this research clearly indicates that the legal system needs to be concerned with the potential for bias that exists in videotaped confessions. This research was supported by funds from the Ohio Board of Regents and the National Science Foundation (BNS-8911067 and SBR-9514966). We thank Kevin Apple, Kim Dudley, Kelly Kinnison, Melanie LaForce, Matthew Leafgren, Richelle Newvahner, Laurie Olsen, John Ray, Alicia Santuzzi, Jason Secondi, and Katie Strieker for their contributions to various aspects of the research. With the exception of Lassiter, order of authorship is alphabetical.     

Individual differences in rates of change in cognitive abilities of older persons

The authors examined change in cognitive abilities in older Catholic clergy members. For up to 6 years, participants underwent annual clinical evaluations, which included a battery of tests from which summary measures of 7 abilities were derived. On average, decline occurred in each ability and was more rapid in older persons than in younger persons. However, wide individual differences were evident at all ages. Rate of change in a given domain was not strongly related to baseline level of function in that domain but was moderately associated with rates of change in other cognitive domains. The results suggest that change in cognitive function in old age primarily reflects person-specific factors rather than an inevitable developmental process.     

Mediation in experimental and nonexperimental studies: new procedures and recommendations

Mediation is said to occur when a causal effect of some variable X on an outcome Y is explained by some intervening variable M. The authors recommend that with small to moderate samples, bootstrap methods (B. Efron & R. Tibshirani, 1993) be used to assess mediation. Bootstrap tests are powerful because they detect that the sampling distribution of the mediated effect is skewed away from 0. They argue that R. M. Baron and D. A. Kenny's (1986) recommendation of first testing the X --> Y association for statistical significance should not be a requirement when there is a priori belief that the effect size is small or suppression is a possibility. Empirical examples and computer setups for bootstrap analyses are provided.     

Toward a more natural medicine

Modern science and culture attempt to dominate and control nature. Unfortunately contemporary medicine has followed this lead. Traditionally religion has recognized the order and goodness in the natural order and has encouraged followers to comply with the rules of nature. Medicine, from Hippocratic times, has viewed the physician as an assistant to nature. Contemporary medicine, while employing modern science, would be well advised to also recognize the healing effects of religion's admonition to acknowledge and respect the wisdom of nature.