Quotes About Meta-analysis

How good a predictor of job productivity is a cognitive test score compared to a job interview? Reference checks? College transcript? The answer, probably surprising to many, is that the test score is a better predictor of job performance than any other single measure. This is the conclusion to be drawn from a meta-analysis on the different predictors of job performance, as shown in the table below.

Several systematic reviews of such studies (called meta-analysis) have been published, and the results are sobering. Low-fat diets produced less weight loss than higher-fat diets, including Mediterranean and low carbohydrate9—raising the possibility that the most widely recommended method for four decades to reduce calorie intake has done more harm than good.

On the basis of a recent meta-analysis,25,26 continuous peripheral analgesic techniques provide superior analgesia, reduce opioid consumption, and reduce opioid-related side effects (nausea and vomiting, sedation, pruritus). This technique is not commonly used in the ICU setting, but it opens a wide range of possibilities for the future treatment of acute pain in critically ill

Castration decreases sexual urges in the subset of sex offenders with intense, obsessive, and pathological urges. But otherwise castration doesn't decrease recidivism rates; as stated in one meta-analysis, "hostile rapists and those who commit sex crimes motivated by power or anger are not amenable to treatment with [the antiandrogenic drugs].

A 2018 meta-analysis of sixty-four earlier studies involving more than five thousand subjects confirms that students learn more effectively if they are asked to explain a concept to themselves than if it is presented to them in other ways. The included studies compared learning outcomes from prompted self-explanation to those produced by a variety of other instructional approaches, including lectures by instructors, solving problems, studying worked problems, and studying text.17

The way to remedy this is through meta-analyses of scientific studies, in which an überresearcher peruses the entire literature, which includes the less-advertised articles, and produces a synthesis.

26. Kieran C. R. Fox, "Is Meditation Associated with Altered Brain Structure? A Systematic Review and Meta-Analysis of Morphometric Neuroimaging in Meditation Practitioners," Neuroscience and Biobehavioral Reviews 43 (2014): 48–73.

What Brad Bushman did is in 2010 he ran what's called a meta-analysis, which is an analysis that looks at a whole bunch of different studies. They concluded that, yes, there is a link between violent video games and aggression.

The longer-term trials performed even worse. In a meta-analysis of eighteen randomized controlled studies lasting a minimum of six months, the diet-plus-exercise group failed to beat out the diet-only group at all.

A recent systematic review and meta-analysis of randomized, controlled weight-loss trials found that about a quarter teaspoon of black cumin powder every day appears to reduce body mass index within a span of a couple of months.