Use a lead-in to introduce the list items and to indicate the meaning or purpose of the list (and punctuate it with a colon). When two items are alternatives, use a bulleted list (with or between). Do not use numbered lists for ORed items. For three or more alternatives, indicate that in the list lead-in. When a separate notice or explanatory paragraph follows a item, indent that separate material to the text of the parent list item. Indented material that elaborates on the parent list item.
double-blind procedure-an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment; a double-blind procedure is used to guard against both experimenter bias and placebo effects.ouble-blind procedure-an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment; a double-blind procedure is used to guard against both experimenter bias and placebo effects.
Double vision (medically known as diplopia) is seeing two images of a single object. The two images may be one on top of the other, side by side, or a mix of both. Double vision may be constant, it may come and go, or it may only occur when you're looking in a particular direction.