Cleaning a self-reported dataset and what you throw away — setting out what I have, and where I think it stops being reliable.
Collecting what is known about cleaning a self-reported dataset in one place, because it is currently spread across a category, two tag pages and a thread that is hard to find.
This is a summary rather than new work, and I have attributed each part to where I found it.
Self-reported, unblinded, self-selected data has known biases and is still worth collecting, provided every one of those words appears in the description.
Someone will know this better than I do and I hope they say so.
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Revisiting: Sample size in a voluntary survey: the selection problem
Revisiting: Sample size in a voluntary survey: the selection problem — setting out what I have, and where I think it stops being reliable. I have spent a fortnight trying to pin Sample size down and I want to…
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2 | 56k | 9mo | |
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Whether an aggregate is worth publishing at all: a disputed topic — does this still hold?
Whether an aggregate is worth publishing at all: a disputed topic — does this still hold? I have a specific reason for asking rather than idle curiosity, and the context is below. An honest uncertainty about…
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+14 | 18 | 3.4k | 2mo |
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Coming back to: A community side-effect dataset, with its response rate and biases
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+27 | 31 | 46k | 9mo |
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Contributing data without breaching anyone's privacy — what changed since
On the subject in the title: Contributing data without breaching anyone's privacy — what changed since Working notes rather than a conclusion. What changes if the standard account of Contributing data without…
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2 | 58k | 17mo | |
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Sample size in a voluntary survey: the selection problem
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+1 | 5 | 12k | 15mo |
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Critiquing an observational claim about a class effect — one year on
Critiquing an observational claim about a class effect — one year on — setting out what I have, and where I think it stops being reliable. I was wrong about Critiquing an observational claim in a thread last…
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+5 | 9 | 3.2k | 8mo |
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Revisiting: What to include when your question involves arithmetic
Revisiting: What to include when your question involves arithmetic — setting out what I have, and where I think it stops being reliable. Counting it rather than describing it, because the count is the part…
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+21 | 25 | 384 | 12mo |
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Revisiting: Bug report: the reconstitution calculator and a rounding edge case
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+109 | 122 | 5.8k | 17mo |
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[2026 update] Publication patterns in the BPC-157 literature, examined
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+15 | 19 | 11k | 4mo |
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Secretagogues and glucose tolerance: the mechanistic concern — what changed since
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+2 | 6 | 31k | 2mo |