As Jacobsen and colleagues acknowledge, studies of musical memory in Alzheimer's disease have been based on small numbers of cases using variable methodology and assessing different kinds of memory, and the extent of any sparing seems rather variable (Omar et al., 2012).
Published population-based studies have used variable methodology, which has influenced findings and made comparisons difficult.
Studies on the effects of insomnia treatment use variable methodologies or do not publish negative results, and there are currently no studies of treatment focusing on morbidity.
In the following, we will highlight study limitations with respect to the variables used, the methodology, and the generalizability of the results, even though the data and methodology that we used were the best available to our knowledge.
In what follows, we highlight limitations with respect to the variables used, the methodology, and the study population.
Socioeconomic status was measured following the methodology used in the Demographic and Health Surveys [ 17], using variables including house construction, possession of items, fuel supply etc.
Tax-return preparation or health care, for example, involves many decision points, alternative courses of action, and variable methodologies.
Recent national studies on PG prevalence have also been conducted in New Zealand [ 10– 12], Sweden [ 13, 14], Switzerland [ 15], Australia [ 16] and Great Britain [ 17], and despite the use of different methodologies and variable technical quality, problem gambling prevalence studies have shown a high degree of consistency in their general findings.
We examine the rationality of individual and consensus professional forecasts of macroeconomic and financial variables using the methodology of Coibion and Gorodnichenko (2015), which focuses on the predictability of forecast errors from earlier forecast revisions.
However, generalisability of the results of the economic evaluations is limited by a lack of transparency in reporting, use of different settings and populations and variable methodology in analyses.
