Statistical Power in Evaluations That Investigate Effects on Multiple Outcomes: A Guide for Researchers

Researchers are often interested in testing the effectiveness of an intervention on multiple outcomes, for multiple subgroups, at multiple points in time, or across multiple treatment groups. The resulting multiplicity of statistical hypothesis tests can lead to spurious findings of effects. Multiple testing procedures (MTPs) are statistical procedures that counteract this problem by adjusting p values for effect estimates upward. Although MTPs are increasingly used in impact evaluations in education and other areas, an important consequence of their use is a change in statistical power that can be substantial. Unfortunately, researchers frequently ignore the power implications of MTPs when designing studies. Consequently, in some cases, sample sizes may be too small, and studies may be underpowered to detect effects as small as a desired size. In other cases, sample sizes may be larger than needed, or studies may be powered to detect smaller effects than anticipated. This paper presents methods for estimating statistical power for multiple definitions of statistical power and presents empirical findings on how power is affected by the use of MTPs.     

Principals’ reactions to feedback received by school inspection: A longitudinal study

This article presents the results of a follow-up study on the attitudes of German principals towards receiving feedback from school inspections. In a first study, we explored the attitudes of 50 principals towards feedback from school inspections [Quality Analysis (QA) in North Rhine-Westphalia] before school inspections took place at these schools (Bitan et al., Int J leadersh Educ 18(4):418–439, 2015). In the present study, the change in attitude of 20 of these principals towards the feedback instrument was investigated in a longitudinal study that took place 6 months after the schools had been inspected. Mixed methods were used. The main aim of the study was to assess the principals’ reactions and attitudes toward the feedback given by school inspectors as well as the change in principals’ attitudes after the school inspection and to explore the underlying reasons for their attitudes and reactions. 20 % of the principals changed to a more negative attitude towards the QA after the inspection, whereas 0 % voiced a neutral attitude. 60 % changed to a more positive attitude and 20 % remained positive after the QA. The discussion presents implications for school inspections as a feedback instrument as well as school development.     

Self-Compassion as a Mediator of Maladaptive Perfectionism and Depressive Symptoms in College Students

The purpose of the study was to examine the relationships among maladaptive perfectionism, self-compassion, and depressive symptoms in college students. It was hypothesized that self-compassion would mediate the relationship between maladaptive perfectionism and depressive symptoms, with maladaptive perfectionism related to lower levels of self-compassion, and lower levels of self-compassion related to greater endorsement of depressive symptoms. Results supported partial mediation, indicating that self-compassion partially accounts for the relationship between maladaptive perfectionism and depressive symptoms. Implications for practice and research are discussed.     

Prevention of Targeted School Violence by Responding to Students' Psychosocial Crises: The NETWASS Program

The standardized, indicated school‐based prevention program “Networks Against School Shootings” combines a threat assessment approach with a general model of prevention of emergency situations in schools through early intervention in student psychosocial crises and training teachers to recognize warning signs of targeted school violence. An evaluation study in 98 German schools with 3,473 school staff participants (M_age = 46.2 years) used a quasi‐experimental comparison group design with three measurement points (pre, post, and 7 months followup) with schools randomly allocated to implementation conditions. The study found increases in teachers' expertise and evaluation skills, enhanced abilities to identify students experiencing a psychosocial crisis, and positive secondary effects (e.g., teacher–student interaction, feelings of safety).     

Applying Self‐Efficacy Theory to Counselor Training and Supervision: A Comparison of Two Approaches

Counseling self‐efficacy, an individual's perception of his or her competence to conduct counseling, is an important component of understanding how counselor trainees subjectively construct their counseling and training experiences and subsequently develop into competent counseling professionals. The author describes 2 approaches to using self‐efficacy theory to develop and implement counselor training and supervision interventions: the self‐efficacy enhancement approach and the self‐efficacy in context approach. Suggestions for tailoring counseling self‐efficacy assessment to the accompanying approach are included.     

“What do I Share?” Personal and Private Experiences in Educational Psychological Counselling

ABSTRACT

The aim of the study is to explore and develop knowledge about how educational psychological counsellors’ personal and private experiences appear in their counselling practice. We conducted four focus group interviews with twelve counsellors from Educational Psychological Counselling Service. Through Thematic Analysis four themes emerged. The first is that counsellors’ personal and private experiences functioned as a backdrop for their counselling practice. The second theme is the counsellors’ use of different types of stories. The third theme deals with how the counsellors were holding back relevant stories. Finally, the fourth theme comprises the purposes of counsellors’ self-disclosure. The conclusion is that personal experiences form a backdrop for counselling practice and are relevant for how a counsellor makes sense of and understands a situation or a problem. Self-disclosure is in some situations used explicitly in the counselling setting. On the other side the counsellors sometimes consciously hold their experiences back.     

Reduced Autobiographical Memory Specificity Among Maltreated Preschoolers: The Indirect Effect of Neglect Through Maternal Reminiscing

Maternal reminiscing and preschoolers’ (M = 5.00 years, SD = 1.11) autobiographical memory specificity (AMS) were examined among abusive (n = 24), neglecting (n = 78), emotionally maltreating (n = 32), and demographically similar nonmaltreating families (n = 74). Neglect was negatively associated with child AMS and the quantity of maternal elaborations. In a moderated mediation model, neglect was negatively associated with the quantity of maternal elaborations, which was positively associated with AMS when mothers reminisced in a coherent and sensitive manner (i.e., affective quality). In the context of high maternal affective quality, maternal elaborative quantity accounted for reduced AMS among neglected preschoolers. The findings extend observations of reduced AMS to neglected preschoolers and inform theoretical models of autobiographical memory development.     

Building a Path to College Success: Advocacy,Discovery and OER Adoption in Emerging Educational Models

ABSTRACT

In this case study we will examine the role of the library in Open Educational Resources through the lens of library value described in Megan Oakleaf's 2010 ACRL report. While librarians in our organization have traditionally not played a role in textbook adoptions, the campus academic goal to increase online, blended and competency-based models is a strategic direction that intersects with the library's strategic vision to increase its contribution to online learning. Further, we will describe the process of building a partnership around OER with the campus Center for Excellence in Teaching and Learning and articulate the impact of our combined services on faculty adoption of OER and student success.     

Meeting the Needs of Avid Book Readers: Access,Space, Concentration Support and Barrier Mitigation

Contemporary libraries perform multiple roles that greatly expand the scope of traditional service and resource provision. In order to determine how libraries can best meet the needs of avid book reading clientele, more needs to be known about their preferences of access and space, as well as barriers to their concentration and performance of sustained reading. Findings from the 2015 International Study of Avid Book Readers suggest that libraries should offer comfortable and quiet spaces conducive to reading for pleasure, that are responsive to the time, cost and concentration barriers that avid readers face, and not assume that avid readers will easily adapt to library environments with elevated noise levels.