Final answer:
Meta-analysis is a technique that consolidates data from multiple studies and is considered compelling evidence due to its robustness and the ability to account for variations and uncertainties.
Step-by-step explanation:
The most compelling evidence from meta-analysis for selecting services at level 1, according to the sources cited, seems to stem from the aggregation and systematic review of data across multiple studies. Meta-analysis is a technique that evaluates the results of many previous studies on a specific subject, which leads to more robust results due to the larger data set. When sources like Mullen & Streiner (2004) and Chorpita et al. (2011) are considered, the use of meta-analysis is often deemed compelling because it can account for variability and uncertainty across different studies and still arrive at conclusions broadly supported by evidence.
However, it is crucial to critically assess the evidence. Users are encouraged to ask questions like "Is the logic of the position apparent and/or credible?", "Do the answers make me more or less willing to accept the author's conclusions?", and scrutinize whether the studies accounted for potential biases or left out relevant points. This critical approach helps ensure that the meta-analytic findings are reliable and applicable.
Furthermore, the quality of data collection and the rigor of the research design before the meta-analysis takes place are also vital to obtaining trustworthy scientific outcomes.