RESUMO
Illusion of control (IOC) is a bias in the judgment of personal success with implications to learning theories and health policies; some important questions in the investigation of IOC may be related to traditional measures in the field, namely self-assessment using Likert scales about the sense of control. Statistical process control (SPC) and Shewhart charts are methods developed to monitor and control industrial processes, never applied in psychological studies before. The present two studies investigated the use of the technique of Shewhart charts in the analysis of IOC. The purpose was to explore the use of SPC and Shewhart charts in the analysis of data sequences from psychological experiments; the objective was to analyze the results of reaction time (RT) data sequences plotted in SPC charts, in comparison with self-assessment judgments from an IOC task. Participants were 63 undergraduate students (Study 1) and 103 mine workers (Study 2) instructed to try to control a traffic light on a computer by pressing or not the keyboard. Higher probabilities of the successful outcome generated judgments of illusion and shifts (due to cognitive activity) in the charts of RT; lower probabilities resulted in null illusion and RT presented a random and stable profile. Patterns for different groups emerged in Shewhart charts. SPC can contribute to the analysis of the behavior of sequences of data in psychological studies, so that the charts indicate changes and patterns not detected by traditional ANOVA and other linear models.
Assuntos
Ilusões , HumanosRESUMO
Emotional Eating (EE) is defined as eating under the influence of negative emotions, and is associated with Eating Disorders, impulsivity, depression and weight gain. However, previous literature is not clear regarding how these variables explain EE. The present study aimed to identify predictors of EE and its relationship to impulsivity, depression, eating style, and weight status in young adults. Sex differences in eating style were examined, and differences in EE between obese/overweight and normal/underweight individuals were tested. Two-hundred college students completed online questionnaires assessing all variables. Low inhibitory control, depression symptoms, female sex, and higher body mass index significantly predicted scores on EE. Obese/overweight and female participants presented increased EE. Correlation analysis evidenced positive associations between EE, Uncontrolled Eating, body mass, and low inhibitory control. Results indicate that EE is related to psychological factors such as impulsivity and depression, and biological factors, such as sex and body mass.
Alimentação Emocional (AE) é definida como comer sob influência de emoções negativas e está associada a transtornos alimentares, impulsividade, depressão e ganho de peso. Entretanto, a literatura não é clara sobre como essas variáveis explicam AE. Este estudo buscou identificar preditores da AE e sua relação com impulsividade, depressão, estilo alimentar e peso corporal em jovens adultos. Foram examinadas diferenças entre sexo no estilo alimentar e diferenças na AE entre indivíduos obesos/com sobrepeso e normais/abaixo do peso. Duzentos estudantes universitários preencheram questionários online avaliando todas variáveis. Baixo controle inibitório, sintomas de depressão, sexo feminino e maior índice de massa corporal predisseram AE. Indivíduos obesos/com excesso de peso e do sexo feminino apresentaram aumento da AE. Foram evidenciadas correlações positivas entre Descontrole Alimentar, peso corporal e baixo controle inibitório. Os resultados indicam que a AE está relacionada a fatores psicológicos, como impulsividade e depressão, e biológicos, como sexo e massa corporal.
Alimentación emocional (AE) se define como comer bajo la influencia de emociones negativas y se asocia con trastornos alimentarios, impulsividad, depresión y aumento de peso. Sin embargo, la literatura no es clara acerca de cómo estas variables explican AE. Este estudio buscó identificar predictores de AE y su relación con impulsividad, depresión, estilo de alimentación y peso corporal en jovenes adultos. Se examinaron diferencias entre sexo en el estilo de alimentación y diferencias en AE entre sujetos obesos/con sobrepeso y normales/con bajo peso. Doscientos estudiantes universitarios completaron cuestionarios en línea evaluando todas variables. Bajo control inhibitorio, síntomas de depresión, género femenino y índice de masa corporal más alto predijeron AE. Personas obesas/con sobrepeso y mujeres mostraron aumento de AE. Se evidenciaron correlaciones positivas entre comida no controlada, peso corporal y bajo control inhibitorio. AE está relacionada con factores psicológicos, como impulsividad y depresión, y biológicos, como género y masa corporal.
