Timeline for What threat to the external validity of a study is not also a threat to its internal validity?
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| when toggle format | what | by | license | comment | |
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| Sep 5, 2021 at 23:53 | answer | added | E Tam | timeline score: 1 | |
| Sep 5, 2021 at 20:54 | comment | added | Conifold | "If the measured effect varies with some circumstances, aren’t these circumstances confounding factors?" No. It is not enough for the measured effect to vary for something to be a confounding factor, the manipulated variable or something related to it also has to vary with them. And while that might have been ruled out for the circumstances of a study such ruling out may not be possible in more general circumstances. | |
| Sep 5, 2021 at 11:28 | answer | added | causative♦ | timeline score: 2 | |
| S Sep 5, 2021 at 10:13 | review | First questions | |||
| Sep 7, 2021 at 14:47 | |||||
| S Sep 5, 2021 at 10:13 | history | asked | 303 | CC BY-SA 4.0 |