before and after with a control group
 

* 1.random assignment of subjects to experimental and control groups with pre-measurement of both groups

English Related Words* a fool and his money are soon parted

* a green salad with french dressing

* a group of

* a hundred and one

* a language with an extensible compiler

* a lick and a promise

* a matter of life and death

* a priori and a posteriori

* a time to weep and a time to laugh

* a town with a past

* a way with words

* a women with a past

* abelian group

* ablaze with anger

* abo blood group system