Life Languages and the DiSC Profile

Comparison of the Kendall Life Language Profile™ (KLLP™) and the DISC®


Foundation Scriptural Foundation:  Romans 12 and Kendall Life Languages™.  Similar to the Seven Motivational Gifts, but much more comprehensive.  Developed by Fred and Anna Kendall. Humanistic Foundation:  Greek Philosopher Hippocrates’ (460-377 BC) Four Humors (moods based on body fluids), psychologist Carl G. Jung’s (1875 – 1961). Theory of Psychological Type (1921/1971), and interpreted by William Moulton Marston’s Two-Dimensional Model.
Purpose Communication Analysis Profile.  Measures communication preferences based on communication characteristics and character qualities.  Measurements show range, intensity, compression, and gaps of each person’s Kendall Life Languages™. Psychological (Personality) Type Indicator. Measures emotive behaviour indirectly by how they prefer to respond to their environment.  This is especially true when the emotions have to do with how they see themselves in relation to a specific environmental situation.  The level of scores indicates how intensely they react to the perceived relationship.
Adaptation Has been secularized to reach secular markets and comply with EEOC standards for government agencies and corporations with government contracts.  Biblical truths and principles are not violated. Sometimes Christianised to reach religious markets and adapt humanistic philosophies to a Christian audience.  Secular theory and philosophy remains the same.
Theory The Kendall Life Languages™.  Are innately God-given.  Everyone has a combination of all seven Life Languages at different levels and intensities.  Each person has a Primary and Last Life Language that does not usually change. Jung’s Psychological Types Theory is a belief that everyone uses four Basic emotive functions:  Thinking, Feeling, Sensing, and Intuiting.  Jung’s Psychological Attitudes were introvert and Extrovert.  Marston adapted the theory to the DISC® scales, which are:  Dominance, Influence, Steadiness and Conscientiousness.
Application Dynamic aspects are more flexible in communication.  A person generally communicates in his or her Primarily Life Language or alternates between his or her Primary and Secondary Life Languages if they are close.  However, everyone can learn to “speak” all the Life Languages.  One can even develop his or her Last Life Language and temporarily use it to communicate.  The more multi-lingual a person is, the healthier he or she becomes in communication abilities. Generalized Application (General characteristics less than specific in matching of people beyond the 4 types Less flexible because you cannot readily move from one quadrant to another.  Type theory is based on preferences and is inflexible.
Depth More comprehensive and less complex.  Currently, there is only one questionnaire form, which has 115 questions.  The report yields varied scores for the Kendall Life Languages™, 14 additional scales, 14 attributes with one profile report.  Future questionnaires are being developed for children and adolescents. Less Comprehensive and more complex:  24 Questions in sets of four, 4 Types: DiSC, and 12 sub-traits with five different profiles in the report.
Accuracy Specific characteristics make closer matches with all kinds of people.  The Kendall Life Languages™ in different combinations and levels of intensity provide extremely close matches of an individual’s communication style.  Instead of putting different people into only 16 boxes, Kendall Life Languages™ generates 5040 possible permutations in five levels of score strengths for each Life Language. Generalised characteristics are less specifically matched to people who may be a combination of other factors beyond the limited 4 Psychological Types (emotive preferences).
Clarity Easy to understand and interpret.  Report explains results specific to the individual KLLP™ is self-interpretive and self-explanatory. Appears easy to Understand at first, but becomes difficult to interpret due to generalisation of only 4 Types to more than four types of people.
Scope Profiles are more closely matched and reflect the person more accurately in all of his or her environments or settings in all areas of his or her life. Specific to one environmental due to the instructions to answer questions in one specific setting:  i.e. office, home, etc.  Specific to emotive processes in the one specific environment.
General Scales Three Categories:  Kinetic, Emotive, and Cognitive. Four Preferences on dichotomous (bi-polar) scales for a totally of eight preferences.
Major Scales Kendall Life Languages™:  Mover, Doer, Influencer, Responder, Shaper, Producer, and Contemplator measured on a scale of 0 – 100 and reported as Very High, High, Moderate, Low and Very Low. Sixteen Types (one process is dominant and second process is auxiliary).
Characteristics 14 Attributes, 49 Character Qualities None
Additional Scales 14 Additional Scales None
Scoring Method Computer scoring by Life Languages Institute®, Inc. Self-scoring
Statistics Statistical Reliability Coefficient Alpha scores .90+ on most scales.  Alpha coefficients are no lower than .82 on all scales and up to .95 on Primary, Secondary, and Last Life Languages. Statistical Reliability Coefficient Alpha on best versions of DISC Profiles average .85 and go no better than .92 on one scale on the Personal Performance System® version.  The weakest scale is the C scale with only .72.
Reliability Test/Retest Reliability is excellent on Kendall Life Languages™ scales but can change due to the dynamics of the multi-lingual aspects. Test/Retest Reliability weak due to the limited number of questions that contribute to the final scale score*.  The 2800 Series Personal Profile System® 6.1 seems to be an improved version of the original DiSC profile test, which was between .36 – .72.
Validity Construct validity show a strong correlation for individual Life Languages.  Criterion Validity for additional scales verified with strong correlation with similar scales on other instruments. In the DiSC model, Scales D (Dominance) and S (Steadiness) are, opposites.  They are negatively correlated.  Scale I (Influence) and C (Conscientiousness) are negatively correlated.  The correlation among scales is smaller than the reliability of the individual scale.


*Information for the DiSC® profiles are primarily from the DiSC® Classic Facilitator’s Manual:  Content Manual for Understanding DiSC Dimensions of Behaviour, (1996), Inscape Publishing, Inc.  DiSC® is a registered trademark of Inscape Publishing, Inc.  Minneapolis, MN.


Kendall Life Languages™, Kendall Life Languages Profile™, and KLLP™ are trademarks of Life Languages Institute®, Inc.  Life Languages Institute®, Inc. is a registered trademark of Life Languages Institute, Inc., Dallas, TX.