Juan Francisco Díaz‐Morales

ORCID: 0000-0002-3894-7908
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Sleep and related disorders
  • Psychological and Temporal Perspectives Research
  • Circadian rhythm and melatonin
  • Perfectionism, Procrastination, Anxiety Studies
  • Early Childhood Education and Development
  • Psychological Well-being and Life Satisfaction
  • Sleep and Wakefulness Research
  • Health and Lifestyle Studies
  • Sleep and Work-Related Fatigue
  • Youth Substance Use and School Attendance
  • Work-Family Balance Challenges
  • Gender Roles and Identity Studies
  • Stress and Burnout Research
  • Educational Outcomes and Influences
  • Child and Adolescent Psychosocial and Emotional Development
  • Obesity, Physical Activity, Diet
  • Behavioral Health and Interventions
  • Nonprofit Sector and Volunteering
  • Motivation and Self-Concept in Sports
  • Education, Achievement, and Giftedness
  • Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Emotional Intelligence and Performance
  • Eating Disorders and Behaviors
  • Sports Performance and Training
  • Cognitive Abilities and Testing

Universidad Complutense de Madrid
2015-2025

Individual Differences
2013-2025

Colciencias
2019

Catholic University of Ávila
2013

Heidelberg University of Education
2012

Universidad Univer
2008

Universidad de Murcia
2003

In this article, we assess the structural equivalence of Zimbardo Time Perspective Inventory (ZTPI) across 26 samples from 24 countries ( N = 12,200). The ZTPI is proven to be a valid and reliable index individual differences in time perspective five temporal categories: Past Negative, Positive, Present Fatalistic, Hedonistic, Future. We obtained evidence for invariance 36 items (out 56) also five-factor structure 23 countries. short scales are country-level analysis, whereas recommend use...

10.1177/2158244013515686 article EN cc-by SAGE Open 2014-01-01

Adolescents in high school suffer from circadian misalignment, undersleeping on weekdays and oversleeping weekends. Since schools usually impose early schedules, adolescents permanent social jetlag (SJL) thus are a suitable population to study the effects of SJL both academic cognitive performance. In this study, 796 aged 12-16 years reported information about their sleep habits, morningness-eveningness (M-E), abilities grade point average (GPA). Time bed weekends was not related abilities,...

10.3109/07420528.2015.1041599 article EN Chronobiology International 2015-06-10

Individuals differ in their timing of sleep (e.g., bedtimes, rise times) and preference for morning or evening hours. Chronotype refers to these differences morningness—eveningness. Adolescents become later chronotypes during puberty, the transition occurs around age 12-14 years. The authors assessed this change among German adolescents using measurements chronotype, pubertal development, parental monitoring. parameters correlated significantly with age, suggesting that older more oriented,...

10.3200/jrl.143.5.509-520 article EN The Journal of Psychology 2009-09-01

Adult men ( n = 582) and women 765) from six nations (Spain, Peru, Venezuela, the United Kingdom, Australia, States) completed two reliable valid measures of chronic procrastination. Because both arousal avoidant procrastination types were significantly related across entire sample r .72, p < .001) within each national sample, regression analyses calculated “pure” procrastinators, controlling for scale scores other scale. Results indicated no significant sex or nationality differences...

10.1177/0022022107302314 article EN Journal of Cross-Cultural Psychology 2007-06-16

Measuring morningness–eveningness is an important aspect of individual differences because it associated with many aspects personality and health. The present study outlines recent advancements in the field measurement proposes improved assessment morningness–eveningness, such as circadian amplitude, updating reflecting new item developments, addressing clock time based measures, morning-biased items uni versus multidimensionality. Four studies have been carried out Germany to a novel...

10.3109/07420528.2016.1171233 article EN Chronobiology International 2016-04-28

10.1016/j.paid.2007.02.002 article EN Personality and Individual Differences 2007-03-22

The authors examined how time orientation and morningness-eveningness relate to 2 forms of procrastination: indecision avoidant forms. Participants were 509 adults (M age = 49.78 years, SD 6.14) who completed measures orientation, morningness-eveningness, decisional procrastination (i.e., indecision), procrastination. Results showed that morningness was negatively related but not Overall, the results indicated different temporal profiles for procrastinations. Avoidant low future morningness,...

10.3200/genp.135.3.228-240 article EN The Journal of General Psychology 2008-07-01

Existing evidence suggests an association between mood, time-of-day and morningness–eveningness (M-E). Since few studies have been carried out among adolescents, in this study daily mood fluctuations were analyzed the naturalistic school context during 2 d order to test how chronotype are related schedule period check if sleep length is involved above relation. A sample of 655 adolescents (12–16 years) reported levels (current level pleasantness) three times day (8:10–8:30 h, 10:20–11:40...

10.3109/07420528.2014.949736 article EN Chronobiology International 2014-08-25

Humans show pronounced individual differences in circadian orientation. Transcultural comparisons are interesting since biological (or environmental) factors together with cultural ones may contribute to morningness–eveningness. We compared Spanish and German undergraduates using the Composite Scale of Morningness (CSM) assess preferences. Confirmatory multiple groups confirmatory factor analysis were used structure structural invariance across countries. The results showed that a...

10.1002/per.632 article EN European Journal of Personality 2007-03-07

Adolescents tend to be much later chronotypes than other age groups. This circadian phase delay is attributed as biological psychosocial factors. Because the consequences of this change on performance and health have been documented, questionnaires identify morning evening‐type adolescents are necessary. The aim present study was validate a Spanish version Morningness‐Eveningness Scale for Children (MESC) by means several relevant psychological variables external criteria. A sample 623 urban...

10.1080/07420520701420659 article EN Chronobiology International 2007-01-01

Individual morningness-eveningness differences explain the rhythmic variations of behavioral and biological patterns. Several studies have corroborated that morningness preference increases over adulthood aging. Adolescents shift their time day preferences from to eveningness during puberty. The aims this study were translate Spanish Morningness-Eveningness Scale for Children (MESC) analyze age sex differences. A group 600 adolescents (aged between 12 16 years) participated in study....

10.1017/s1138741600004248 article EN The Spanish Journal of Psychology 2008-05-01

The aim of this study was to provide validity for the Spanish version Morningness–Eveningness-Stability Scale – improved (MESSi), a novel evolved assessment circadian typology which considers subjective phase and amplitude by morning affect (MA), eveningness (EV) distinctness (DI; amplitude) sub-scales. Convergence MESSi with reduced Morningness–Eveningness Questionnaire (rMEQ) relationships General Health (GHQ-12) sensitivity reward punishment (SR SP) were analyzed. Two different samples,...

10.1080/07420528.2017.1361437 article EN Chronobiology International 2017-09-21

Background The effect of morningness–eveningness, sleep habits, and intelligence on academic performance has been studied in a fixed morning school shift. However, no studies have analysed these variables an afternoon shift tested whether morningness–eveningness is related to beyond habits effects. Aims psychometric properties the Morningness–Eveningness Scale for Children ( MESC ) were analysed. Additionally, performance, sex, intelligence, relationship compared. Sample sample consisted 400...

10.1111/bjep.12196 article EN British Journal of Educational Psychology 2017-11-01

Summary The external validity of the Morningness–Eveningness Scale for Children was analysed via objective measures skin temperature, light exposure and motor activity with ambulatory circadian monitoring methodology. A total 138 adolescents (57 boys 81 girls) aged 12–13 years, who in addition to completing determine their typology wore a wrist device (Kronowise 3.0; Kronohealth SL) during school days weekend, participated. Circadian parameters, such as mesor, amplitude acrophase, were...

10.1111/jsr.14444 article EN cc-by Journal of Sleep Research 2025-01-02

Previous studies conducted in adults indicated that the distinctness, is, subjective feeling of fluctuations mood and activation - was associated with health to a greater extent than were morning affect eveningness, but few have examined these relationships among adolescents. A sample 342 Spanish adolescents (11-14 years; 44.7% girls) assessed for affect, health-related quality life, life satisfaction, depression symptoms, sleep habits, self-reported academic performance. The results...

10.1080/07420528.2025.2469870 article EN Chronobiology International 2025-02-24
Coming Soon ...