Early personality theory: types
Astrology (star signs)
Palmistry (palm reading)
Phrenology (bumps of the head)
o Franz Josef Gall
Somatotypes (body shapes)
o Sheldon 1954
Psychological types (introvert vs extrovert)
o Jung 1921
Type indicator
o (today)
Types of measures for data
Self-report data
o Structured
True/ false, multiple choice, questionnaire
o Unstructured
Open-ended questions
o Advantages
Access to wealth of info
May be obtained at anytime
o Disadvantages
Problematic when responders don’t cooperate
Responders interpret items incorrectly
Responders may not have good knowledge of self
Life-outcome data
o Public records, social activity information provides data on person
E.g., register office records on birth/ marriage
o Advantages
Public records are easy to obtain
o Disadvantages
Many factors may affect life outcome
Observer-report data
o Target person observed and reported by:
Individuals who know the person e.g., spouse/ parents
Individuals know do not know the person e.g., objective observer
o Setting may be naturalistic or artificial
Behaviour may change due to being observed
Other factors may include unlike in lab settings
Is it ethical to observe without permission?
o Advantages
External behaviour (impression on others) is assessed
Multiple observers can report different aspects
o Disadvantages
Labour intensive and costly
Potential bias especially when observer knows the person
Observer may be biased due to their own personal characteristics
Astrology (star signs)
Palmistry (palm reading)
Phrenology (bumps of the head)
o Franz Josef Gall
Somatotypes (body shapes)
o Sheldon 1954
Psychological types (introvert vs extrovert)
o Jung 1921
Type indicator
o (today)
Types of measures for data
Self-report data
o Structured
True/ false, multiple choice, questionnaire
o Unstructured
Open-ended questions
o Advantages
Access to wealth of info
May be obtained at anytime
o Disadvantages
Problematic when responders don’t cooperate
Responders interpret items incorrectly
Responders may not have good knowledge of self
Life-outcome data
o Public records, social activity information provides data on person
E.g., register office records on birth/ marriage
o Advantages
Public records are easy to obtain
o Disadvantages
Many factors may affect life outcome
Observer-report data
o Target person observed and reported by:
Individuals who know the person e.g., spouse/ parents
Individuals know do not know the person e.g., objective observer
o Setting may be naturalistic or artificial
Behaviour may change due to being observed
Other factors may include unlike in lab settings
Is it ethical to observe without permission?
o Advantages
External behaviour (impression on others) is assessed
Multiple observers can report different aspects
o Disadvantages
Labour intensive and costly
Potential bias especially when observer knows the person
Observer may be biased due to their own personal characteristics