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add docs clarification

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Josh de Leeuw 2021-12-07 11:16:26 -05:00
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docs/reference/jspsych-randomization.md
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@ -485,8 +485,10 @@ Returns the seed value.
### Description ### Description
This function will override the behavior of `Math.random()` to produce a seedable pseudo random number generator. This function will override the behavior of `Math.random()` to produce a seedable pseudo random number generator.
It uses the [seedrandom package](https://www.npmjs.com/package/seedrandom). It uses the [seedrandom package](https://www.npmjs.com/package/seedrandom).
Note that calling `setSeed()` will change how `Math.random()` behaves for the entire document.
If you have non-jsPsych components on the page that use `Math.random()` they will be affected.
Using `setSeed()` without passing in a seed will generate a random 32-bit seed. Using `setSeed()` without passing in a seed will generate a random 32-bit seed.
The seed value will be returned from the function call, allowing you to save it in the data for the experiment if needed. The seed value will be returned from the function call, allowing you to save it in the data for the experiment if needed.