W10 Lecture 2 - Intelligence & IQ PDF

# 8/10 W10 Lecture 2 ## Intelligence & IQ Alfred binet (1857-1911) - developed techniques for identifying children who lack success in normal classrooms - learned skills were not tested explicitly ### Binet's Scale - age level assigned to each reasoning task - **Mental age:** age assigned to the m...

# 8/10 W10 Lecture 2 ## Intelligence & IQ Alfred binet (1857-1911) - developed techniques for identifying children who lack success in normal classrooms - learned skills were not tested explicitly ### Binet's Scale - age level assigned to each reasoning task - **Mental age:** age assigned to the most difficult task you could complete - **Binet's goal:** **p**ul**y** to help identify students of remedial education (to help **anb** improve) #### Binet's Stipulations 1. The scores are a practical device 2. The scale is rough 3. Low scores shall not be used to mark children as innately as possible ### Goddard - took Binet test and used it on immigrants - determined this mental age scale: - <2 = **do外** - 3-7 = imbecile - 8-12 = feebleminded - moron = highest functioning mentally retarded # Lewis Terman (1916) - revised and published Binet tests called Stanford-Binet - marked industrialization of intelligence tests - introduced the intelligence quotient (IQ) - evidence back then concerns started around consequences of intelligence questions. ## Intelligence Quotient (IQ) - introduced in Stanford-Binet test - problematic around if mental age is the most appropriate way to assess intelligence - **Ratio IQ = (Mental age / Chronological age) * 100** - proposed by Stern (1912) - adopted by Terman ### Problems with Ratio IQ - only works if mental age is only growing proportionally with chronological age - difficult to make comparisons of intellect across age levels - hard to apply to adults ### New IQ idea: Using z scores of relative data in age groups to determine IQ - Raw score -> z scores deviation TA scores - Deviation IQ -> gives appearance of stability in IQ