@article{ref1,
title="Methodological problems in assessing the impact of television programs",
journal="Journal of Social Issues",
year="1976",
author="Ball, Samuel",
volume="32",
number="4",
pages="8-17",
abstract="The impact of television in general cannot be accurately assessed, but it is argued that reasonable assessments can be made of the impact of specific television programs. The components of three areas that pose special problems to the evaluation of television programs are discussed: design, sampling, and measurement. Methods for ameliorating difficulties in these problem areas are suggested.<p /><p>Language: en</p>",
language="en",
issn="0022-4537",
doi="10.1111/j.1540-4560.1976.tb02504.x",
url="http://dx.doi.org/10.1111/j.1540-4560.1976.tb02504.x"
}