GTP validation

Would you like to have a copy of the GTP Scale?
Are you interested in further validating the GTP Scale?

Please contact Dr Angelica Ortiz de Gortari by email.

More details about the items in the scales.

Read below for details of the validation studies and obtain a copy.

The GTP scale with 20 items has been validated in Turkish, Polish, Spanish and Chinese.
The short version of the GTP scale (GTP5-SF) based on the original with 20 items has been validated in Norwegian and Spanish.
An extended version, the GTP-MDS (38 items) assesses GTP in a more meticulous way, considering outer and inner phenomena and the wide spectrum of involuntary phenomena (thoughts, imagery, misperceptions, perceptual distortions, hallucinations, and dissociations).

Read below for details of the validation studies.

Dr Angelica B. Ortiz de Gortari developed the first items for assessing GTP with Professor Mark D. Griffiths as part of her PhD at Nottingham Trent University. The scale was further validated in collaboration with Dr Halley Pontes currently at the University of Tasmania.

Our paper: Ortiz de Gortari, A. B., Pontes, H., & Griffiths, M. D. (2015). The Game Transfer Phenomena Scale: An instrument for investigating the non-volitional effects of video game playing. Cyberpsychology, Behavior, and Social Networking, 18(10), 588-594.

Dr Chaoguang Wang at Guangdong University of Finance & Economics, China, in collaboration with Dr Angelica B. Ortiz de Gortari has validated the Chinese version of the GTP scale with 20 items among 625 Chinese video game players. Results showed that the Game Transfer Phenomena Scale has good validity among Chinese video game players and can effectively assess GTP in this population.

Dr Andrzej Cudo and Dr Angelica B. Ortiz de Gortari validated the GTP-20 scale in 675 Polish video game players. The results showed the Polish version of the GTPS is reliable, valid, and adequate for assessing Game Transfer Phenomena (GTP) in both genders. Read more about the results.

Download a copy of the study.

Dr Angelica and Dr Andrzej validated the GTP-20 scale in Spanish in a sample of 608 Mexican video game players. The first aim was to adapt and validate the GTP scale and the second was to examine the adequacy of the frequency rating scale used in the GTPS. The results showed the higher-order factor model showed acceptable results. The prevalence of GTP was 96%. The number of game genres played and session length was correlated with all GTPS subscales, confirming the criterion validity. The examination of the frequency rating scale via the item response theory showed that selecting the second level of the scale “once” should be treated with caution.

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Dr Muhterem Dindar at the University of Oulu had the initiative to conduct the first survey on GTP in a sample of minors (15+) and together with Dr Ortiz de Gortari validated the GTP Scale in a Turkish sample.

Our paper: Dindar, M., & Ortiz de Gortari, A. B. (2017). Turkish Validation of the Game Transfer Phenomena Scale (GTPS): Measuring altered perceptions, automatic mental processes and actions and behaviours associated with playing video games. Telematics and Informatics, 34(8), 1802-1813.

Dr Angelica B. Ortiz de Gortari in collaboration with Åge Diseth validate the Game Transfer Phenomena Multidimensional Scale (GTP-MDS) which considers the perceived location of the GTP experiences. A total of 1,301 players, the majority male, participated in the study.