Introduction: Time series analysis is particularly useful, especially in disciplines that require close longitudinal monitoring. Despite their great usefulness, its use is not common in fields such as psychology. For this reason, the authors of this work used time series to carry out a study on tobacco addiction. The results showed that tobacco behaviour followed an AR (2)(7) 8 model, that is, the sample had a 56-day memory. The objective of the present work is to verify the statistical power and the effect size of the model that they found. Method: Given the absence of information in the previous references, an analysis of time series was performed a posteriori imitating the models founded in the previous studies. It was calculated using G*Power software if our sample size is large enough to obtain a model with statistical power and a good effect size. Results: The output indicates that a minimum of 17 subjects are needed, with 63 data each day (a total of 1071 data) to obtain a model with a good statistical power and effect size. Conclusion: To sum up, we conclude with the affirmation that time series analysis has a poor statistical power, so samples for this type of analysis should be quite large. Furthermore, the ideal number of subjects to obtain an adequate statistical power and an effect size should be checked by a previous study or, if that is not possible, a posteriori analysis.
resumenLa pornografía se ha convertido en uno de los intereses más compartido por la sociedad moderna, por lo tanto, el objetivo de este artículo es la realización de una escala que mida actitudes hacia la pornografía. El cuestionario incluyó ítems con respecto a las dimensiones de diversión, excitación, aprendizaje y norma social, referidas a la pornografía. El grupo de estudio estuvo formado por 126 sujetos (59 hombres y 67 mujeres), con edades comprendidas entre 18 y 63 años (mediana: 24 años). La consistencia interna es alta, aunque el análisis factorial confirmatorio no ha verificado nuestras dimensiones propuestas. La falta de material científico sobre las actitudes sociales hacia la pornografía sugiere la conveniencia de realizar futuros estudios exploratorios sobre el tema.Palabras clave: escala, pornografía, actitudes, validez, fiabilidad.
AbstractPornography has become one of the most widespread interests in the modern society, therefore, the objective of this article is the construction of a scale that measures the attitudes towards pornography. The questionnaire contained a series of items that belonged to the dimensions enjoyment, sexual excitement, learning, and social norm. The study group was formed by 126 participants (59 men and 67 women), with ages between 18 and 63 years old (median: 24 years). Internal consistency of the scale is high, showing homogeneity between ítems. However, the factorial analysis has refused the factors we proposed. Lack of scientific material about social attitudes toward pornography suggests desirability of carrying out further exploratory studies about this topic.
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