Dr. Juan Botella

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Academic Career Length

34Years (1993-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2006 in Psychological Methods

Journal Article

Assessing heterogeneity in meta-analysis: Q statistic or I² index?

Tania B. Huedo-Medina

Julio Sánchez-Meca

Fulgencio Marín-Martínez

Juan Botella

In meta-analysis, the usual way of assessing whether a set of single studies is homogeneous is by means of the Q test. However, the Q test only informs meta-analysts about the presence versus the absence of heterogeneity, but it does not report on the extent of such heterogeneity. Recently, the I(2) index has been proposed to quantify the degree of heterogeneity in a meta-analysis. In this article, the performances of the Q test and the confidence interval around the I(2) index are compared by means of a Monte Carlo simulation. The results show the utility of the I(2) index as a complement to the Q test, although it has the same problems of power with a small number of studies.

1 November 2017 in Educational Research Review

Journal Article

Effects of self-assessment on self-regulated learning and self-efficacy: Four meta-analyses

Ernesto Panadero

Anders Jonsson

Juan Botella

1 September 2012 in European Psychiatry

Journal Article

Peer and family influence in eating disorders: A meta-analysis

Y. Quiles Marcos

M.J. Quiles Sebastián

Lidia Pamies-Aubalat

Juan Botella

Janet Treasure

Objective: The aim of the present study was to undertake a systematic review using meta-analysis procedures to assess the relationships between eating disorders and peer and family influence and to evaluate whether gender plays a moderator role in that relationship.Method: PsycINFO, Medline, Web of Science, EPSCO and Embase databases from 1980 to 2010 were searched in June and October 2010. Hand searching of relevant reference sections was also undertaken.Results: It was possible to obtain 83 effect sizes from the 25 studies selected. Results showed that both peers and family influence dieting behavior, body dissatisfaction and bulimic symptoms in adolescent girls and boys. Furthermore, the analyses of the moderator variables showed that the variability of the effect sizes found was, in some cases, explained by gender, influence type and the country of the sample.Discussion and conclusion: These results highlight how daily social interactions can influence unhealthy eating practices in adolescent girls and boys, and suggest that weight-related issues of parents and peers can be transmitted to adolescents.

12 November 2013 in The Spanish Journal of Psychology

Journal Article

A Meta-Analysis of the Diagnostic Accuracy of the SCOFF

Juan Botella

Ana Rosa Sepúlveda

Huiling Huang

Hilda Gambara

A meta-analysis was conducted to reach a pooled estimate of the diagnostic accuracy of the SCOFF. The 15 selected studies represented a total of 882 cases and 4350 controls. The main criterion for inclusion was that the primary study had provided diagnostic classification with both a diagnostic reference and with the SCOFF (with five items and a cut-off point of two). The pooled estimates were .80 (sensitivity) and .93 (specificity). The moderator variables gender and type of measure for the diagnostic reference (interview versus psychometric tests) account for part of the observed variability. For diagnostic references based on interviews the estimate of the efficacy improves significantly. For the studies that match this criterion the sensitivity is .882 and the specificity .925 (diagnostic odds ratio, 92.19). The main conclusion was that the five questions of the SCOFF constitute a very useful screening tool, in several languages; it is highly recommended for screening purposes.

1 April 2002 in Personality and Individual Differences

Journal Article

Vehicles of spatial ability

ROBERTO COLOM

María José Contreras

Juan Botella

José Santacreu

6 February 2017 in British Journal of Mathematical and Statistical Psychology

Journal Article

Analysis of categorical moderators in mixed‐effects meta‐analysis: Consequences of using pooled versus separate estimates of the residual between‐studies variances

Maria Rubio Aparicio

Julio Sánchez-Meca

José Antonio López‐López

Juan Botella

Fulgencio Marín‐Martínez

About Me

Dr. Juan Botella is a professor of Methodology of the Behavioral Sciences at the Department of Social Psychology and Methodology, Autonomous University of Madrid. His research activity has developed in various fields of psychology, especially in the study of human attention, but also in research methodology and candidate assessment and selection. Dr. Juan Botella has led several research projects financially supported by public research institutions from Spain. He is a member of several scientific societies: the European Society for Cognitive Psychology, the Psychonomic Society, and Spanish Society of Experimental Psychology (SEPEX). Dr. Juan Botella has published four books and more than fifty papers in scientific journals of psychology. Dr. Juan Botella is a member of the Editorial Board of the journals Studies of Psychology and Psychology and a reviewer of the following journals, among others: Cognitiva, European Journal of Psychological Assessment, Journal of Experimental Psychology: Human Perception and Performance, Perception and Psychophysics, Psicothema and Revista Española de Geriatrics, Visual Cognition, and Gerontology.

Dr. Juan Botella

Dr. Juan Botella

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