Sequential detection of learning in cognitive diagnosis

In order to look more closely at the many particular skills examinees utilize to answer items, cognitive diagnosis models have received much attention, and perhaps are preferable to item response models that ordinarily involve just one or a few broadly defined skills, when the objective is to hasten learning. If these fine‐grained skills can be identified, a sharpened focus on learning and remediation can be achieved. The focus here is on how to detect when learning has taken place for a particular attribute and efficiently guide a student through a sequence of items to ultimately attain mastery of all attributes while administering as few items as possible. This can be seen as a problem in sequential change‐point detection for which there is a long history and a well‐developed literature. Though some ad hoc rules for determining learning may be used, such as stopping after M consecutive items have been successfully answered, more efficient methods that are optimal under various conditions are available. The CUSUM, Shiryaev–Roberts and Shiryaev procedures can dramatically reduce the time required to detect learning while maintaining rigorous Type I error control, and they are studied in this context through simulation. Future directions for modelling and detection of learning are discussed.     

Gender differences in supervisors’ multidimensional performance ratings: Large sample evidence

We examined gender differences in supervisor ratings of overall job performance and 37 performance dimensions. Based on data from a large, diverse sample of managers (N = 3,367) and nonmanagers (N = 9,670), we found that gender had only minimal effects on ratings for a small number of specific job performance dimensions. This was generally true regardless of whether the job performance dimension was more agentic or communal in nature, whether the job was a managerial or a nonmanagerial position, and regardless of the proportion of men or women that traditionally occupy a specific job. Overall, our results are more consistent with the gender similarities hypothesis than the agency/communion paradigm, role congruity theory, and the lack of fit model. We discuss future research avenues and implications.     

Therapists’ Perspectives of the Cotherapy Experience in a Training Setting

The experience of cotherapy has been sparsely addressed in the literature. This qualitative study’s goals were to explore (a) the usefulness of cotherapy as a training model (b) the impact of cotherapy on services provided; (c) the impact of being trained in a cotherapy model; and (d) factors that both facilitated and hindered the process of cotherapy. The authors conducted a focus group interview with seven participants who graduated from a COAMFTE accredited MFT master’s program. Participants unanimously reported they believed cotherapy impacted client outcomes and training. They also expressed that cotherapists’ unwillingness to address issues within the cotherapy team negatively impacted the cotherapy relationship and client outcomes. Data analysis yielded four main themes, including cotherapy as a vehicle for personal growth, accountability in the cotherapy relationship, need for safety in the cotherapy relationship, and cotherapy team’s need for supervision.     

Interpreting confidence intervals: A comment on Hoekstra,Morey, Rouder,and Wagenmakers (2014)

Hoekstra, Morey, Rouder, and Wagenmakers (Psychonomic Bulletin & Review 21(5), 1157–1164 2014) reported the results of a questionnaire designed to assess students’ and researchers’ understanding of confidence intervals (CIs). They interpreted their results as evidence that these groups “have no reliable knowledge about the correct interpretation of CIs” (Hoekstra et al. Psychonomic Bulletin & Review 21(5), 1157–1164 2014, p. 1161). We argue that their data do not substantiate this conclusion and that their report includes misleading suggestions about the correct interpretations of confidence intervals.     

A Positive Psychology Intervention for Patients with an Acute Coronary Syndrome: Treatment Development and Proof-of-Concept Trial

Positive psychological constructs are associated with superior outcomes in cardiac patients, but there has been minimal study of positive psychology (PP) interventions in this population. Our objective was to describe the intervention development and pilot testing of an 8-week phone-based PP intervention for patients following an acute coronary syndrome (ACS). Initial intervention development and single-arm proof-of-concept trial, plus comparison of the PP intervention to a subsequently-recruited treatment as usual (TAU) cohort. PP development utilized existing literature, expert input, and qualitative interview data in ACS patients. In the proof-of-concept trial, the primary outcomes were feasibility and acceptability, measured by rates of exercise completion and participant ratings of exercise ease/utility. Secondary outcomes were pre-post changes in psychological outcomes and TAU comparisons, measured using effect sizes (Cohen’s d). The PP intervention and treatment manual were successfully created. In the proof-of-concept trial, 17/23 PP participants (74 %) completed at least 5 of 8 exercises. Participants rated the ease (M = 7.4/10; SD = 2.1) and utility (M = 8.1/10, SD = 1.6) of PP exercises highly. There were moderate pre-post improvements (ds = .46–.69) in positive affect, anxiety, and depression, but minimal effects on dispositional optimism (d = .08). Compared to TAU participants (n = 22), PP participants demonstrated greater improvements in positive affect, anxiety, and depression (ds = . 47–.71), but not optimism. A PP intervention was feasible, well-accepted, and associated with improvements in most psychological measures among cardiac patients. These results provide support for a larger trial focusing on behavioral outcomes.     

Are bilingual children better at ignoring perceptually misleading information? A novel test

Does speaking more than one language help a child perform better on certain types of cognitive tasks? One possibility is that bilingualism confers either specific or general cognitive advantages on tasks that require selective attention to one dimension over another (e.g. Bialystok, 2001 ; Hilchey & Klein, 2011 ). Other studies have looked for such an advantage but found none (e.g. Morton & Harper, 2007 ; Paap & Greenberg, 2013 ). The present study compared monolingual and bilingual children's performance on a numerical discrimination task, which required children to ignore area and attend to number. Ninety‐two children, ages 3 to 6 years, were asked which of two arrays of dots had ‘more dots’. Half of the trials were congruent, where the numerically greater array was also larger in total area, and half were incongruent, where the numerically greater array was smaller in total area. All children performed better on congruent than on incongruent trials. Older children were more successful than younger children at ignoring area in favor of number. Bilingual children did not perform differently from monolingual children either in number discrimination itself (i.e. identifying which array had more dots) or at selectively attending to number. The present study thus finds no evidence of a bilingual advantage on this task for children of this age.     

Use of Genetic Tests among Neurologists and Psychiatrists: Knowledge,Attitudes, Behaviors,and Needs for Training

This study explores neurologists’ and psychiatrists’ knowledge, attitudes, and practices concerning genetic tests. Psychiatrists (n?=?5,316) and neurologists (n?=?2,167) on the American Medical Association master list who had agreed to receive surveys were sent an email link to a survey about their attitudes and practices regarding genetic testing; 372 psychiatrists and 163 neurologists responded. A higher proportion of neurologists (74 %) than psychiatrists (14 %) who responded to the survey had ordered genetic testing in the past 6 months. Overall, most respondents thought that genetic tests should be performed more frequently, but almost half believed genetic tests could harm patients psychologically and considered legal protections inadequate. Almost half of neurologists (49 %) and over 75 % of psychiatrists did not have a genetics professional to whom to refer patients; those who had ordered genetic tests were more likely than those who did not do so to have access to a genetic counselor. Of respondents, 10 % had received patient requests not to document genetic information and 15 % had received inquiries about direct-to-consumer genetic testing. Neurologists reported themselves to be relatively more experienced and knowledgeable about genetics than psychiatrists. These data, the first to examine several important issues concerning knowledge, attitudes and behaviors of neurologists and psychiatrists regarding genetic tests, have important implications for future practice, research, and education.     

Nonlinear analyses in sales research: theoretical bases and analytical considerations for polynomial models

Despite theoretical bases that may support nonlinear relationships, there is a relative paucity of studies testing these effects in organisational and behavioural research. Theories hypothesising linear associations among variables in sales research found to have low predictive validity are prime candidates for re-conceptualisation with theories predicting nonlinear relationships. In the sales domain, while nonlinear-oriented theories have been advanced and many nonlinear associations have been explored, myriad additional variables may possess theoretically-based nonlinear relationships with key sales-related outcomes. Further, nonlinear integration can be useful in improving linear analyses involving moderation. The purpose of this article is to expound upon and promote the utilisation of theoretically-driven nonlinear analyses in sales research. In this pursuit, the article delineates the rationale for nonlinear examinations and provides an extensive review of nonlinear research conducted in the extant sales literature. Based on this review, theoretical bases used to support nonlinear hypotheses are advanced and types of polynomial tests are identified. Additionally, guidelines in conducting and interpreting main effect and moderated polynomial analyses are provided along with future research opportunities for nonlinear analyses in sales research.     

The effects of grace interventions in church communities*

Grace remains little studied though several recent studies have developed promising ways to measure grace. Here we report two studies involving grace interventions as part of an ongoing investigation of positive psychology in the context of Christian church communities, Study One used a crossover design in which two congregations were measured on grace and other variables at the outset, and again after phases one and two. One congregation received a grace intervention during phase one and the second during phase two. Results showed increased scores on grace but not an expected increase in marital satisfaction among married participants. Study Two used a similar design with two additional congregations to assess effects of a grace intervention on self-forgiveness. As expected, congregants receiving the grace intervention showed increases in trait self-forgiveness when compared to those in the wait-list.     

Flash-induced forward and reverse illusory line motion in offset bars

Illusory line motion (ILM) refers to perception of motion in a bar that onsets or offsets all at once. When the bar onsets or offsets between two boxes after one of the boxes flashes, the bar appears to shoot out of the flashed box (_flashILM). If the bar offsets during the flash, it appears to contract into the flashed box (reverse ILM; rILM). Onset bars do not show rILM. Moreover, rILM and _flashILM are not correlated, indicating they are two different illusions. To date, rILM has only been studied using a 50-ms flash where the bar offsets 16.7 ms after flash onset. It is not clear if rILM is due to the 16.7-ms flash-bar-removal stimulus onset asynchrony (SOA) or due to the flash offsetting after the bar. The current studies explore these parameters to better understand the conditions that lead to rILM. The results suggest that _flashILM is sensitive to the temporal interval between flash onset and bar offset, while rILM appears to arise when the flash offsets after the bar has been removed regardless of the temporal interval between flash onset and bar removal. These results are consistent with _flashILM reflecting visual exogenous attention while rILM may reflect the low-level spreading of subthreshold activation radiating from the flashed box. The findings are incorporated into the recent work that suggests that the literature concerning ILM is possibly conflating a number of different illusions of line motion, including polarized gamma motion (PGM), transformational apparent motion (TAM), and exogenous attention induced motion (_flashILM).