Otis–Lennon School Ability Test

The Otis–Lennon School Ability Test (OLSAT), published by the successor of Harcourt Assessment—Pearson Education, Inc., a subsidiary of Pearson PLC—is, according to the publisher, a test of abstract thinking and reasoning ability of children pre-K to 18. The Otis-Lennon is a group-administered (except preschool), multiple choice, taken with pencil and paper, measures verbal, quantitative, and spatial reasoning ability. The test yields verbal and nonverbal scores, from which a total score is derived, called a School Ability Index (SAI). The SAI is a normalized standard score with a mean of 100 and a standard deviation of 16. With the exception of pre-K, the test is administered in groups.

The test has twenty-one subtests that are organized into five areas—verbal comprehension, verbal reasoning, pictorial reasoning, figural reasoning, and quantitative reasoning—each with equal numbers of verbal and non-verbal items:

The number of questions and the time limit varies accordingly:

The Verbal section consists of Verbal Comprehension and Verbal Reasoning questions. The Verbal Comprehension questions are made up of four types of questions: Following Directions, Antonyms, Sentence Completion, and Sentence Arrangement. This section is used to evaluate a child's ability to observe and comprehend relationships between words, to build sentences, and to understand different definitions of words based on context. There are seven types of Verbal Reasoning questions: Aural Reasoning, Arithmetic Reasoning, Logical Selection, Word/Letter Matrix, Verbal Analogies, Verbal Classification, and Inference. This section assesses a child's ability to determine relationships between words, to observe similarities and differences, and to apply conclusions in different scenarios.

The Nonverbal section consists of three sections: Pictorial Reasoning, Figural Reasoning, and Quantitative Reasoning. In the Pictorial Reasoning section, there are three types of questions: Picture Classification, Picture Analogies, and Picture Series. This section evaluates a child's ability to reason using different images and illustrations, to find similarities and differences, and to comprehend and continue progressions.

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