In a human system, a major proportion of behavioural attributes and values are determined by respective cultures and interaction with other cultures. Cultural and cross-cultural psychology has emerged as an interdisciplinary area that explores how a culture regulates society and its business, how cross-cultural interactions affect the psychologies of individuals as well as societies, behavioural variability under various cultural conditions, and how to harmonize the cultural diversities. Organizationally and philosophically, cultural and cross-cultural psychology differs from other areas of social sciences. It is a common phenomenon that as people engage with cultural practices, their thoughts, feelings, and behaviours come to reflect their cultural values and beliefs. As a process, people formulate, replicate, transform and/or transmit their cultural practices in their daily social and/or business interactions. This edited book 'Handbook of Research on Cultural and Cross-cultural Psychology', is focused on dynamics that amplify knowledge, skills, and behaviors relevant to deal with different cultural and cross-cultural issues. All the chapters suggest that 'relevance' and 'being critical' are qualities widely attributed to efforts that fill the gaps between theory and practice in cultural and cross-cultural psychology.