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CA (542,968)
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Psychology (8,019)
PSYC37H3 (113)
Bouffard (6)
Lecture

Lecture 2

2 Pages
110 Views

Department
Psychology
Course Code
PSYC37H3
Professor
Bouffard

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Lecture 2: Reliability and Validity
Testing Vs. Assessment
Assessment Procedures: Informal Assessment, Ability Testing, The clinical interview, personality testing
Psychological construct:
no causation
have to look at many different construct to form a diagnosis
encompasses a lot more than just a single test
Both involve:
identifying areas of concern
collecting data
Psychological testing:
administering tests
focuses solely on collection of data
Assessment:
more broad goals
involves several clinical tools
uses clinical skill to interpret data
Can psychological properties be measured?
Common complaint
oPsychological variable cant be measured
We regularly make assessment of other people
Quantitative
Implicit in these statements
Measurement
Process of assigning numbers to objects in way that specific properties of objects faithfully
represented by specific properties of numbers
Psychological tests do not attempt to measure total person, but only specific set of attributes
Used to capture a construct
Statistics
Statistics important because they give us method for answering questions about meaning of those
numbers
3 statistical concepts are central to psychological measurement:
Variability
Correlation
Prediction
Test worthiness:
4 cornerstones to test worthiness:
Validity
Reliability
Cross-cultural fairness (became important in the last decade)
Correlation coefficient: statistical expression of relationship between 2 sets of scores or variables
Positive correlation- direct relationship
Negative correlation- inverse relationship
Number between -1 and +1
As number approaches +1 it increases in a direct way
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Description
Lecture 2: Reliability and Validity Testing Vs. Assessment Assessment Procedures: Informal Assessment, Ability Testing, The clinical interview, personality testing Psychological construct: no causation have to look at many different construct to form a diagnosis encompasses a lot more than just a single test Both involve: identifying areas of concern collecting data Psychological testing: administering tests focuses solely on collection of data Assessment: more broad goals involves several clinical tools uses clinical skill to interpret data Can psychological properties be measured? Common complaint o Psychological variable cant be measured We regularly make assessment of other people Quantitative Implicit in these statements Measurement Process of assigning numbers to objects in way that specific properties of objects faithfully re
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