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Jim Hyland wrote:
>
> At 12:23 AM 9/27/96 -0400, Joao Paulo wrote:
> >
> >Which is the meaning of this expression "double-blind" exactly ?
>
>         People's reactions to substances ingested can be guaged more
> accurately if some of them get the medicine or whatever and some of them get
> placebos or sugar pills that look just like the medicine.    If those

Hi Jim,

Thanks for the excelent explanation.I had a suspiccion on that and now I know for
sure.

Good wishes to you and your family.

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