The effects of the campaign on intention and awareness are indistinct and could be a consequence of (the results of) a self-selection bias.
This indicates that there is a selection effect prior to the start of the apprenticeship, be it a self-selection or an employer-motivated selection effect.
One of the biggest is a self-selection bias.
Is there a self-selection effect?
"There is a self-selection process," he said.
Also a consequence of self-selection, this sample included only middle age and older adults.
The low inclusion rate is most likely due to low inclusion activity among GPs, health visitors and midwives and is not likely a consequence of self-selection among parents and children.
The participation rate dropped during the study period [ 4], and could be a consequence of the long duration of the study resulting in a decreasing awareness, causing low recruitment activity among many GPs and midwifes, and not a consequence of self-selection among women.
The result is a cycle of self-selection.
The cohort sample was self-selected which incurs a risk of self-selection bias.
