Purpose This paper examines the effect of personality disorders, namely loneliness and shyness, on the family business successors' attitude towards social networking services (SNS). Design/methodology/approach In this study the personality disorder and attitude towards using WhatsApp are analysed in a sample of 511 family business successors, aged 18 and up to more than 50 years. Participants completed questionnaires designed for the purposes of the study specifically using for loneliness factor the UCLA Loneliness Scale (Russell et al., 1978) and for shyness the Sociability Scale (Cheek and Buss, 1981). We use two statistical methods: the first statistical technique is an exploratory factor analysis to show that shyness can be measured down into two dimensions (1) lack of confidence and (2) hesitancy, while loneliness also can be measured into the two dimensions: (1) amiability and (2) abandonment. The second statistical method uses structural equation modelling (SEM) to fit the data to the proposed model. Findings The results indicate that neither a lack of confidence nor amiability has a significant effect on the attitude towards instant messaging, while hesitancy and abandonment both have significant effects on attitude. Moreover, abandonment has a stronger effect on attitude than hesitancy. Research limitations/implications In this study were not included other related social disorders that other scholars normally study in such projects. For example, narcissism, addiction and socially anxious are very important and have results that conflict with ours. Originality/value The causal relations between the two independent factors of shyness and loneliness and the dependent factor of attitude towards using an Internet and SNS in family businesses from the Arab world have not yet been clearly and fully explored. This study aims to fill this gap through studying the impact of personality disorder (loneliness and shyness) on attitude to use SNS by the successors of family businesses.
