Slosson IQ

 

What: 

A cognitive aptitude assessment designed to evaluate an individual's mental ability.

 

Who:

Used for persons with a chronological age of 27-216 months (approximately 2-18 years) and/or mental age from 31-271 months (2.5-23 years).

 

Why:

Used to provide initial screening to estimate the IQ (intellectual quotient) of an individual.

 

When:

Can be used as needed.

 

How:

1. Have materials ready (test manual with questions, student scoring sheet, extra sheet for student use as needed, norm tables).

2. Calculate student's chronological age, CA.

3. Begin testing one year below or one year above, based on knowledge of the student.

4. Ask questions and record correct or incorrect response on scoring sheet (have extra sheet available as needed for specific items).

5. Stop testing when the student has missed 10 items in a row.

6. Score the assessment:

   • Find the basal age (BA) - point just below the first error after 10 successful responses (last question that marks 10 correct in a row - go down one level).

   • Find the mental age (MS) - count the number of correct responses passed after the basal age - add this credit to basal age (see chart for credit calculations).

   • Find the IQ by matching the CA and MA in the norms tables.