PsycAssess_M4_Binet Scale Evolution

30 items with increasing order of difficulty

Used norms of 50 "normal" school age children

What are the highlights of the 1905 Binet-Simon Scale?

Lack of adequate measuring unit

Lack of normative data

Lack of valid data

What are the issues of the 1905 Binet-Simon Scale?

Lack of adequate measuring unit: Introduced mental age to create a key unit of measurement

Lack of normative data: Used age-scale to establish normative data

How did the 1908 Scale address the issues of the 1905 Binet-Simon Scale?

Difficulty comparing ability across various tasks

Test yielded a single score that focused heavily on reading and verbal language

What are the issues of the 1908 scale?

Bigger standardization sample (1000 Caucasian children from California)

Increases in age range

Major change: Introduction of IQ score which provides a score across all task domains instead only reading and verbal language

How did the 1916 Stanford-Binet Intelligence Scale address the issues of the 1908 scale?

Standardization sample still not representative

IQ Score limitations

What are the issues of the 1916 Stanford-Binet Intelligence Scale?

Mental age range increased

Extended age range

Improved instructions and scoring standards

Addition of performance items

Better standardization sample

Major: Creation of two parallel forms to address possible cultural biases and reach a diverse audience

How did the 1937 scale address the issues of the 1916 Stanford-Binet Intelligence Scale?

Some reliability coefficients were low (higher for older test-takers)

Different ages had different standard deviation of scores (meaning, IQ scores were not equivalent at different age groups)

What are the issues of the 1937 Scale?

Major: Rejected the IQ concept and uses standard scores instead (Mean=100, SD=16)

New norms from 2,100 children (100 at each age level, including non-Caucasian children)

How did the 1960 Stanford-Binet Revision address the issues of the 1937 Scale?

Use of one general mental ability score to represent intelligence was still questionable

What are the issues of the 1960 Stanford-Binet Revision?

Incorporated the gf-gc model of intelligence

4 major content areas that all reflected 'g': Verbal Reasoning, Abstract/Visual Reasoning, Quantitative Reasoning, and Short-term Memory

New format: 15 subtests with adaptive testing (use of basal and ceiling)

How did the 1986 Stanford-Binet revision address the issues of the 1960 Stanford-Binet Revision?

Unstandardized hierarchical model

Verbal and non-verbal tasks were not equally weighted

What are the issues of the 1960 Stanford-Binet Revision?