Disappearing teaspoons: Teabags and forks are confounding factors

The case of the disappearing teaspoons: longitudinal cohort study of the displacement of teaspoons in an Australian research institute.

OBJECTIVES To determine the overall rate of loss of workplace teaspoons and whether attrition and displacement are correlated with the relative value of the teaspoons or type of tearoom. DESIGN Longitudinal cohort study. SETTING Research institute employing about 140 people. SUBJECTS 70 discreetly numbered teaspoons placed in tearooms around the institute and observed weekly over five mon...

Are Disappearing Dwarfs Just Lying Low?

Recent redshift surveys have shown that the excess galaxies seen in faint galaxy number counts (above those expected given the local galaxy luminosity function) are not evolved giants at high redshifts, but low to moderate luminosity objects at more modest redshifts. This has led to the suggestion that there was once an additional population of dwarf galaxies which has since disappeared, ie. th...

Brain death: assessment, controversy, and confounding factors.

When brain injury is refractory to aggressive management and is considered nonsurvivable, with loss of consciousness and brain stem reflexes, a brain death protocol may be initiated to determine death according to neurological criteria. Clinical evaluation typically entails 2 consecutive formal neurological examinations to document total loss of consciousness and absence of brain stem reflexes ...

Confounding Factors for Hamilton’s Rule

WWC STANDARDS Brief: Confounding Factors

WWC STANDARDS Brief The What Works Clearinghouse (WWC) is an initiative of the U.S. Department of Education’s Institute of Education Sciences. The WWC evaluates research studies that look at the effectiveness of education programs, policies, and practices, which the WWC calls “interventions.” WWC Standards Briefs explain the rules the WWC uses to assess the quality of studies. For more informat...