Optimal Time Lags in Panel Studies
Optimal Time Lags in Panel Studies
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DOI：
10.1037/met0000041
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发表时间：
2015-12-01
影响因子：
7
通讯作者：
Griffin, Mark A.
中科院分区：
文献类型：
--
作者：
Dormann, Christian;Griffin, Mark A.
交叉滞后回归系数经常被用来检验面板设计中的假设。然而，这些系数具有特殊的性质，因此很难解释。具体地说，交叉滞后回归系数可以根据不同测量场合之间的相应时间滞后而变化。本文引入了最优时滞的概念。进一步证明，面板研究中的最佳时滞与所研究变量的稳定性有关，而在单向系统中，最优时滞可能与可能的真实效应的大小无关。结果还表明，面板设计的最佳时间滞后通常很短。其含义是：(A)解释交叉滞后回归系数需要考虑测量场合之间的时间滞后，以及(B)在许多研究中，比文献中经常发现的时间滞后短得多的时间滞后是合理的，我们呼吁在未来进行更多的“短时”研究。
Cross-lagged regression coefficients are frequently used to test hypotheses in panel designs. However, these coefficients have particular properties making them difficult to interpret. In particular, cross-lagged regression coefficients may vary, depending on the respective time lags between different sets of measurement occasions. This article introduces the concept of an optimal time lag. Further, it is demonstrated that optimal time lags in panel studies are related to the stabilities of the variables investigated, and that in unidirectional systems, they may be unrelated to the size of possible true effects. The results presented also suggest that optimal time lags for panel designs are usually quite short. Implications are (a) that interpreting cross-lagged regression coefficients requires taking the time lag between measurement occasions into account, and (b) that in much research, far shorter time lags than those frequently found in the literature are justifiable, and we call for more "shortitudinal" studies in the future.