I might also test these hypotheses:<p><i>People improve (or degrade) their performance at objectively measured tasks when told they should be better (or worse) at doing them than others.</i><p><i>The magnitude of the above effect differs between men and women.</i><p>In other words, repeat the experiment, this time (falsely) telling the test subjects that, according to prior experimental results, female assemblers should be able to complete the task faster and more accurately than males.  See what happens.<p>If tested and confirmed, the effect would be similar to the placebo effect in medical trials.