The IDS-2 has a modular design so that each assessment session covers the areas needed in an individual way. Testing times (approximate) are:
Intelligence: IQ screening (10 minutes); IQ general (50 minutes); IQ complete profile (90 minutes).
Executive Functions (30 minutes).
Psychomotor Skills (20 minutes).
Social-emotional Skills (15 minutes).
Basic Skills (according to age 30-60 minutes).
Motivation and Attitude (7 minutes).
The IDS-2 is scored using the state-of-the-art continuous norming process via the online Hogrefe Test System 5 (HTS 5). Scoring is free of charge (pricing is included with the printed test protocol) and no annual HTS license is required.
Continuous Norming allows for more precise calculations. The IDS-2 provides standardization data at one-month intervals, making printed booklets impossibly large. Hogrefe’s innovative NormViewer technology in HTS 5 provides access to the calculated tables with just a few clicks.
Reliability and Validity
Information on internal consistency and test-retest reliability is available on all languages. Studies are available on construct validity with various assessments (e.g. IDS, WIS-IV), on criterion validity (e.g. with school performance) and on differential validity (e.g. ADHD, autism spectrum disorder, intelligence impairment, exceptional talent) depending on the language.