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Dr Mircea Zloteanu ☀️ 🌊🌴<p><a href="https://mastodon.social/tags/statstab" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>statstab</span></a> #371 Safeguard Power as a Protection Against Imprecise Power Estimates</p><p>Thoughts: tl;dr - when replicating a study, use the lower end of the CI of the original study as your effect in a power analysis.</p><p><a href="https://mastodon.social/tags/poweranalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>poweranalysis</span></a> <a href="https://mastodon.social/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a> <a href="https://mastodon.social/tags/replication" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>replication</span></a></p><p><a href="https://journals.sagepub.com/doi/10.1177/1745691614528519" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">journals.sagepub.com/doi/10.11</span><span class="invisible">77/1745691614528519</span></a></p>
Dr Mircea Zloteanu ☀️ 🌊🌴<p>🚨New blog post 📝: Your Study Is Too Small (If You Care About Practically Significant Effects)</p><p><a href="https://mastodon.social/tags/effectsize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>effectsize</span></a> <a href="https://mastodon.social/tags/precision" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>precision</span></a> <a href="https://mastodon.social/tags/poweranalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>poweranalysis</span></a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>research</span></a> <a href="https://mastodon.social/tags/Psychology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Psychology</span></a> <a href="https://mastodon.social/tags/MCID" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MCID</span></a> <a href="https://mastodon.social/tags/SESOI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SESOI</span></a> <a href="https://mastodon.social/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a> </p><p> <a href="https://open.substack.com/pub/mzloteanu/p/your-study-is-too-small-if-you-care?r=3b457w&amp;utm_campaign=post&amp;utm_medium=web&amp;showWelcomeOnShare=true" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">open.substack.com/pub/mzlotean</span><span class="invisible">u/p/your-study-is-too-small-if-you-care?r=3b457w&amp;utm_campaign=post&amp;utm_medium=web&amp;showWelcomeOnShare=true</span></a></p>
Dr Mircea Zloteanu ☀️ 🌊🌴<p><a href="https://mastodon.social/tags/statstab" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>statstab</span></a> #353 The Abuse of Power; The Pervasive Fallacy of Power Calculations for Data Analysis</p><p>Thoughts: An seminal paper on "post hoc" power calculations.</p><p><a href="https://mastodon.social/tags/power" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>power</span></a> <a href="https://mastodon.social/tags/QRPs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>QRPs</span></a> <a href="https://mastodon.social/tags/NHST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NHST</span></a> <a href="https://mastodon.social/tags/posthoc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>posthoc</span></a> <a href="https://mastodon.social/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a> <a href="https://mastodon.social/tags/effectsize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>effectsize</span></a></p><p><a href="https://www.tandfonline.com/doi/abs/10.1198/000313001300339897" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">tandfonline.com/doi/abs/10.119</span><span class="invisible">8/000313001300339897</span></a></p>
Dr Mircea Zloteanu ☀️ 🌊🌴<p><a href="https://mastodon.social/tags/statstab" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>statstab</span></a> #297 Sample sizes for saturation in qualitative research</p><p>Thoughts: A complicated (and contentious) topic for quals research.</p><p><a href="https://mastodon.social/tags/qualitative" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>qualitative</span></a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>research</span></a> <a href="https://mastodon.social/tags/sample" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sample</span></a> <a href="https://mastodon.social/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a> <a href="https://mastodon.social/tags/saturation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>saturation</span></a> <a href="https://mastodon.social/tags/methodology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>methodology</span></a> <a href="https://mastodon.social/tags/guide" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>guide</span></a> <a href="https://mastodon.social/tags/review" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>review</span></a> </p><p><a href="https://www.sciencedirect.com/science/article/pii/S0277953621008558" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sciencedirect.com/science/arti</span><span class="invisible">cle/pii/S0277953621008558</span></a></p>
Joel Snyder<p>Application of JNDs to meta-science. Very sensible!</p><p>"For example, in clinical settings researchers may specify this smallest effect size of interest as the smallest difference in a health condition that patients themselves notice...this practice has been used at least since the advent of psychophysics in the second half of the 19th century"</p><p><a href="https://neuromatch.social/tags/metascience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metascience</span></a> <a href="https://neuromatch.social/tags/psychology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>psychology</span></a> <a href="https://neuromatch.social/tags/neuroscience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>neuroscience</span></a> <a href="https://neuromatch.social/tags/effectsize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>effectsize</span></a> <a href="https://neuromatch.social/tags/psychophysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>psychophysics</span></a> <a href="https://neuromatch.social/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a> </p><p><a href="https://www.nature.com/articles/s41562-024-01858-z?utm_source=nathumbehav_etoc&amp;utm_medium=email&amp;utm_campaign=toc_41562_8_5&amp;utm_content=20240529" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">nature.com/articles/s41562-024</span><span class="invisible">-01858-z?utm_source=nathumbehav_etoc&amp;utm_medium=email&amp;utm_campaign=toc_41562_8_5&amp;utm_content=20240529</span></a></p>
Jan R. Boehnke<p>One of the most problematic areas in the submission we get and papers I review are the sections on <a href="https://mastodon.social/tags/SampleSize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SampleSize</span></a> justifications.</p><p>See for example <span class="h-card" translate="no"><a href="https://mastodon.social/@lakens" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>lakens</span></a></span>' excellent paper on the topic:<br><a href="https://psyarxiv.com/9d3yf/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">psyarxiv.com/9d3yf/</span><span class="invisible"></span></a><br>It now comes with a process guide in a <a href="https://mastodon.social/tags/ShinyApp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ShinyApp</span></a>, which is an excellent support:<br><a href="https://shiny.ieis.tue.nl/sample_size_justification/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">shiny.ieis.tue.nl/sample_size_</span><span class="invisible">justification/</span></a><br><a href="https://mastodon.social/tags/Rstats" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Rstats</span></a></p><p>For <a href="https://mastodon.social/tags/HRQL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HRQL</span></a> researchers:<br><a href="https://rdcu.be/dnfO4" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">rdcu.be/dnfO4</span><span class="invisible"></span></a></p><p>And many people teach this stuff, e.g., ☺️ <br><a href="https://www.researchgate.net/publication/335813329_Estimating_sample_sizes_based_on_required_precision_for_surveys_and_epidemiological_research" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">researchgate.net/publication/3</span><span class="invisible">35813329_Estimating_sample_sizes_based_on_required_precision_for_surveys_and_epidemiological_research</span></a></p><p><a href="https://mastodon.social/tags/StudyDesign" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>StudyDesign</span></a> <a href="https://mastodon.social/tags/NightshifEditor" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NightshifEditor</span></a></p>
Jan R. Boehnke<p>Online <a href="https://mastodon.social/tags/workshop" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>workshop</span></a>:<br>Simulation-based power analyses in (generalized) linear mixed models<br>17.05.2023, 10-12h CEST</p><p>The workshop will cover basics of power analysis, linear mixed models, and why the combination of both requires a simulation-based approach.</p><p>In my experience, this is for many areas of <a href="https://mastodon.social/tags/HealthSciences" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HealthSciences</span></a> and <a href="https://mastodon.social/tags/HRQL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HRQL</span></a> research a key problem when designing studies.</p><p>Maybe worth a read as well:<br><a href="https://link.springer.com/article/10.3758/s13428-021-01546-0" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">link.springer.com/article/10.3</span><span class="invisible">758/s13428-021-01546-0</span></a></p><p><a href="https://mastodon.social/tags/PowerAnalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PowerAnalysis</span></a> <a href="https://mastodon.social/tags/SampleSize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SampleSize</span></a> <a href="https://mastodon.social/tags/Rstats" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Rstats</span></a> <a href="https://mastodon.social/tags/mixedpower" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mixedpower</span></a> <a href="https://mastodon.social/tags/ZPID" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ZPID</span></a></p>
Dominik Vogel<p>Can anyone point me to a paper/post explaining why you should not base your sample size calculation on the effect found in the literature or a pre-test? Pretty sure I read it once but cannot find it anymore. Maybe I saw it in <span class="h-card"><a href="https://mastodon.social/@lakens" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>lakens</span></a></span>'s course? <a href="https://fediscience.org/tags/poweranalysis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>poweranalysis</span></a> <a href="https://fediscience.org/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a></p>
Claes de Vreese ☑️<p>This looks fascinating:</p><p>“We reviewed empirically-based studies of sample sizes for saturation in qualitative research.</p><p>We confirmed qualitative studies can reach saturation at relatively small sample sizes.</p><p>Results show 9–17 interviews or 4–8 focus group discussions reached saturation.”</p><p><a href="https://mastodon.social/tags/qualitative" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>qualitative</span></a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>research</span></a> <a href="https://mastodon.social/tags/saturation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>saturation</span></a> <a href="https://mastodon.social/tags/samplesize" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>samplesize</span></a> <a href="https://mastodon.social/tags/academicchatter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>academicchatter</span></a> </p><p><a href="https://www.sciencedirect.com/science/article/pii/S0277953621008558" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sciencedirect.com/science/arti</span><span class="invisible">cle/pii/S0277953621008558</span></a></p>