Question

What rule of thumb is used to determine whether the FSIQ score and each index is appropriate to interpret?

a) Comparing it to the participant's memory performance
b) Evaluating the score based on the participant's age and education level
c) Assessing the score's deviation from the average IQ of the population
d) Using the score to predict future academic achievements

Answer 1

To interpret FSIQ and index scores appropriately, professionals look for consistent scores across indices with no more than a 15-point difference between them. Discrepancies suggest focusing on individual index scores rather than the FSIQ.

Step-by-step explanation:

To determine whether the Full Scale IQ (FSIQ) score and each index score from an IQ test are appropriate to interpret, professionals usually assess the score comparisons across the different indices of the test. For example, a commonly used test, the Wechsler Intelligence Scale for Children (WISC-V), provides index scores for Verbal Comprehension, Visual Spatial, Fluid Reasoning, Working Memory, and Processing Speed, in addition to the FSIQ. When interpreting these scores, one guideline is to ensure that there is not significant variability among the index scores, as large discrepancies could suggest that the composite FSIQ may not be a valid representation of the individual's overall cognitive abilities. A common rule of thumb is to look for a difference of 15 points or more between the highest and lowest index scores. If such discrepancies exist, it would be more appropriate to focus on the individual index scores rather than the FSIQ. It is important for qualified professionals to interpret these scores within the context of each person's unique background and presenting concerns.