# The issue of adding random slopes in non-central parameterization

**URL:** <https://discourse.mc-stan.org/t/the-issue-of-adding-random-slopes-in-non-central-parameterization/34034>\
**Category:** Modeling\
**Tags:** rstan, specification\
**Created:** [February 5, 2024, 8:38am UTC](https://discourse.mc-stan.org/t/the-issue-of-adding-random-slopes-in-non-central-parameterization/34034 "2024-02-05T08:38:10Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![zrn](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/zrn/32/17777_2.png) [@zrn](https://discourse.mc-stan.org/u/zrn)\
**Post date:** [February 13, 2024, 5:41am UTC](https://discourse.mc-stan.org/t/the-issue-of-adding-random-slopes-in-non-central-parameterization/34034/4 "2024-02-13T05:41:13Z")

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@ [Bob\_Carpenter](https://discourse.mc-stan.org/u/Bob_Carpenter) Unfortunately, the problem has not been solved. Thank you for your reply! I put the code for the centered parameterized and non-centered parameterized versions in [Why The effects unexpectedly became smaller after employing non-central parameterization？](https://discourse.mc-stan.org/t/why-the-effects-unexpectedly-became-smaller-after-employing-non-central-parameterization/34082). I am puzzled why the significance of the effect is so different in the two versions of the model.  
I really need help：（

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