1 / 41

2nd level analysis design matrix, contrasts and inference Alexander Leff

Overview Why do 2nd-level analyses? Image based view of spm stats. Practical examples of 2nd level design matrices. Correction for multiple comparisons.. 2nd Level inference. Study Group. Sample Group. . . . Inference. Sampling. In order for inferences to be valid about the study gr

lalaine
Download Presentation

2nd level analysis design matrix, contrasts and inference Alexander Leff

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    3. 2nd Level inference

    4. Theoretical basis for 2nd level analyses Depends on whether you want to generalize your findings beyond the subjects you have studied (sample group). Usually this is the case, however: Karl’s ‘talking dog’. In a human, this happens: In humans, this happens. In this group of patients… : In patients…

    25. 2nd level analysis – what’s different? Maths is identical. Con.img at the first level are output files, at the second level they are both input and output files. 1st level: variance is within subject, 2nd level: variance is between subject. Different types of design matrix (3 examples).

More Related