The Internet Disorder Scale (IDS-15)
The IDS-15 (Pontes & Griffiths, 2017) was developed by Dr. Halley M. Pontes during his PhD. This psychometric test was created with collaboration of Dr. Mark D. Griffiths at Nottingham Trent University. The IDS-15 was developed in a study that involved the participation of 1.105 English-speaking Internet users.
The IDS-15 has a total of 15 items and measures and conceptualizes Internet addiction according to the four distinct latent domains: ‘Escapism and dysfunctional emotional coping‘, ‘Withdrawal symptoms‘, ‘Impairments and dysfunctional self-regulation‘, and ‘Dysfunctional Internet-related self-control‘.
This IDS-15 was developed to assess Internet addiction and its symptoms according to the nine Internet Gaming Disorder (IGD) criteria as suggested by the American Psychiatric Association in the latest edition of the Diagnostic and Statistical Manual of Mental Disorders(DSM-5).
Psychometric properties: The IDS-15 has been shown to exhibit adequate levels of validity as assessed by means of construct validity (i.e., factorial, convergent, and discriminant validity) (ii) criterion validity. The IDS9-SF has also been shown to be reliable according to several indicators of reliability [all information about the validity of the scale can be found in the original study]
So far, the IDS-15 has been only validated in the following languages:
Spanish (Currently being developed, more information available soon)
If you wish to further develop and validate the IDS-15 in another language, please do get in touch with Dr. Halley M. Pontes by email: firstname.lastname@example.org.