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SF 7-855 CHW 2c hw, _ FBI Laboratory does not ase the Psychological Stress ‘Evaluator’ 7 .., ..-{PSE). or. have personnel | trained to review PSE tapes... It is... +. obvious_that_pye vi tim _exhibited_stress.in certain areas. otis “ -o-\ --tnvestigative varus ibe pointed out; -however;- that: --—— - this technique has not been validated and is purely subjective. a impressions by the examiner. Recent findings of an extensive Army study of PSE indicate clear inferiority of voice analysis — in its present state::of development not only to the polygraph ., . but also to judgments’ made on the basis of simply observing a subject's behavior. “The American Polygraph Association dis- o - approves of this technique and the published training of PSE examiners consists of two ‘to tive days. | No » Laboratory report is being. ybmitteds ly oe ma ~ERADS ~ | SAN FRANCISCO 0-2 ate, - -. AT BERKELEY, HILLSBOROUGH” “AND SAN FRANCISCO, CALIFORNIA. ' W4iil attempt to obtain additional items of PATRICIA CAMPBELL | HEARST, such as school papers and books and submit -them to the = _ FBI Laboratory in order to obtein additional jatent prints of. . . HEARST. : vowel PME Dg Ce he Be AT SAN FRANCISCO, CALIFORNIA. ls will “attempt 1 to a ao obtain voluminous ‘additional handwriting and hand printing of . “NANCY LING PERRY containing similar letters, letter combinations | as appear in questioned writing for future comparison.. Additional known writing should have been prepared as _contemporar, as, «> ‘possible to .the. questioned. writing... oe “2. ‘WALL attempt ‘to obtain ‘additional voluminous ® handwriting and hand printing by EMILY HARRIS comparable . to.” ‘the questioned writing, before a more adequate couparison ean . he made with the guest Zoned writing. 7 i COVER PAGE