This book focuses on the latest developments in psychology research. The first chapter reviews the effects of acute aerobic exercise and high intensity interval training (HIIT) on positive and negative affect. The following chapters discuss alexithymia, psychological flexibility and social anxiety; analyses the ethical implication of discrimination, especially discrimination that may occur inadvertently, through a type of stigma; presents eating disorders in women as a multifaceted and complex social phenomenon; evaluates the potential of visible facial behavior in studies of affective disorders; studies infants’ communication and parental triad nonverbal interactions; and examines the challenges and practices, and provides research on distinguishing grief from depression in the clinical setting.