Introduction Personality assessment is a core activity in the field of psychology and to perform this task, a variety of instruments are available. Cervone and Pervine (2010) elaborate that personality psychology attempts to describe the whole person by considering universal traits as well as individual differences. Personality assessment helps a person to better understand themselves and the people around them. This paper will set out to analyze three personality assessment instruments: Myers-Briggs, Rorschach and Self-help books. From this analysis, the validity and relevance of each instrument will be highlighted. Myers-Briggs The Myers-Briggs Type Indicator (MBTI) is a personality measure developed by Isabel Briggs Myers and Katharine Cook Briggs as an extrapolation of the Swiss psychiatrist, Carl Jung’s theory of psychological types The MBTI is made up of four types: Extraversion-Introversion (EI), Sensing- Intuition (SN), Thinking-Feeling (TF), and Judging-Perception (JP) (Saggino, Cooper, & Kline, 2000). EI is a measure of the tendency by the individual to focus their energy either towards self (inward) or others (outward). SN is a measure of how the person prefers to gather information. TF measures the decision making preference of a person. JP is a measure of how a person approaches life. The four preference types identified combine into a psychological type and 16 distinct personality types result from this. Strengths and weaknesses A major advantage of the Myers Briggs framework is that is helps an individual to understand their own personalities and behavior. In addition to this, the framework helps people recognize that others may be different which encourages mutual respect and a deeper appreciation for the contributions of others (Saggino et al., 2000). The scales and scoring metrics of the MBTI are well explained and an individual can easily use this tool for personality assessment. A major disadvantage of the Myers-Briggs instrument is that it is not effective in identifying subtle personality types. Cervone and Pervin (2010) note that this tool does not measure personality variation along a continuum but rather, it sets out to gauge a persons status on the extreme ends of the personality categories. Validity The validity and reliability of MBTI has been supported by many researchers since the instrument uses scientific methods. As such, independent testers can come to the same conclusion concerning a subject’s personality by use of this tool. Even so, the validity of MBTI scale contents has been questioned by a number of researchers. For example, Miao et al. (2001) demonstrated that there is a convergent and discriminate validity of the EI, TF and JP scale. Comprehensiveness The MBTI proposes to offer insights into a person’s personality type. It does this by sorting an individual into opposite categories based on his/her predisposed preferences for attitudes and mental functions. Application The MBTI is one of the most popular personality instruments used for assessment. It is used for recruitment purposes since it highlights a person’s characteristics. It is also used by counselors to help a client better understand themselves. The cultural utility of the MBTI is very wide and it is uses vary from personal to professional. Rorschach The Rorschach tes