Research interests: personality and temperament theory and measurement including comprehensive temperament theory; comprehensive approach to measurement of emotions. Developed personality scales include: Emotional Empathy, Achieving Tendency, Self-Esteem, Optimism, Violence Risk, Dominance (or Internal Control), Arousal (or Sensation) Seeking, Trait Arousability (or general Emotionality),Trait Anxiety, Depression, Habitual Alcohol & Drug Use, Somatism, Panic Disorder, Affiliative Tendency (or sociability). Developed child development scales include: Comprehensive Measures of Child Language Ability (CLAM), Child Arousability, Parental Attitudes Scales. Currently engaged in extensive research on Emotional Intelligence (defined as an individual's potential for life success).