Chatsworth High students must retake AP test after irregularities found in results

Advanced Placement students at Chatsworth High will have to retake the psychology test administered last week after an "irregular pattern" was detected in the exam results, officials said Wednesday.

School officials also postponed all other AP tests until next week in order to maintain the integrity of test scores, which can be used to extend collge credit to high-school students.

Los Angeles Unified officials said Chatsworth High was the only district school to report testing problems.

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