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@article{61126,
   author = {Tkaczyk, Michal and Tancoš, Martin and Šmahel, David and Elavsky, Steriani and Plhák, Jaromír},
   article_location = {Oxford},
   article_number = {September},
   doi = {http://dx.doi.org/10.1016/j.chb.2024.108281},
   keywords = {accuracy; convergent validity; self-reports; smartphone use; screentime; phone-checking behavior},
   language = {eng},
   issn = {0747-5632},
   journal = {Computers in Human Behavior},
   title = {(In)accuracy and Convergent Validity of Daily End-of-day and Single-time Self-reported Estimations of Smartphone Use among Adolescents},
   url = {https://www.sciencedirect.com/science/article/pii/S0747563224001493},
   volume = {158},
   year = {2024}
}

TY  - JOUR
ID  - 61126
AU  - Tkaczyk, Michal - Tancoš, Martin - Šmahel, David - Elavsky, Steriani - Plhák, Jaromír
PY  - 2024
TI  - (In)accuracy and Convergent Validity of Daily End-of-day and Single-time Self-reported Estimations of Smartphone Use among Adolescents
JF  - Computers in Human Behavior
VL  - 158
IS  - September
SP  - 1-11
EP  - 1-11
PB  - Elsevier
SN  - 0747-5632
KW  - accuracy
KW  - convergent validity
KW  - self-reports
KW  - smartphone use
KW  - screentime
KW  - phone-checking behavior
UR  - https://www.sciencedirect.com/science/article/pii/S0747563224001493
N2  - Understanding the measurement inaccuracy and bias introduced by self-reports of smartphone use is essential for making meaningful inferences about smartphone use and its effects. Evidence for the self-reports of smartphone use in intensive longitudinal studies is largely missing. Based on self-reported and digital trace data from 137 Czech adolescents (41% girls, Mage = 14.95 years), this study examined the accuracy, directional bias, and convergent validity of daily end-of-day and single-time reports of screen time and phone-checking behavior. Overall, the study found considerable discrepancies between self-reported smartphone use and digital trace and low between-person convergent validity for all self-reports considered for the study. Respondents usually reported shorter screen time and lower frequency of phone-checking behavior as compared to digital trace, both in daily and single-time self-reports. The within-person convergent validity between daily reports and digital tracking was low, indicating poor self-reports ability to capture the actual day-to-day fluctuations in smartphone use. This study adds to the existing evidence showing that self-reports based insights into how people use smartphones differ considerably from digital trace data and shows that both person and situational levels contribute to explaining the discrepancy between digital trace and self-report data among adolescents.
ER  - 

TKACZYK, Michal, Martin TANCOŠ, David ŠMAHEL, Steriani ELAVSKY a Jaromír PLHÁK. (In)accuracy and Convergent Validity of Daily End-of-day and Single-time Self-reported Estimations of Smartphone Use among Adolescents. \textit{Computers in Human Behavior}. Oxford: Elsevier, 2024, roč.~158, September, s.~1-11. ISSN~0747-5632. Dostupné z: https://dx.doi.org/10.1016/j.chb.2024.108281.