Hello again, I tried out the eyetracking tutorial, and ran into an error when running the down-sampling step:
>>> ds = fft_resample(raw_ds, 100, window='hann', ... chunks_attr='trial', attr_strategy='sample') python(2418) malloc: *** error for object 0x7fbad35fc008: incorrect checksum for freed object - object was probably modified after being freed. *** set a breakpoint in malloc_error_break to debug Abort trap: 6 Do you know where I'm going wrong? Thanks so much for your help, -Bruna On Mon, Sep 17, 2012 at 3:53 PM, Bruna Martins <[email protected]>wrote: > Hi There, > > I am a complete newbie to PyMVPA, and currently doing an eyetracking > study. I'm currently navigating the eyetracking tutorial, but wanted to get > your pearls as well- thanks for your patience in advance. My study has a > within-subjects design, where each trial is either condition A or B, and > we're looking at gaze differences between the conditions. Stimuli are > randomly presented either on the left or the right side of the screen, so > the analysis is a little complex . I am hoping to do two different things: > > 1. Input difference scores between (Xcoord- Xcenter) and (Ycoord- > Ycenter) for each trial- there will be a different number of trackable > instances for each timepoint (depending on whether track was lost, blink > frequency, etc) to predict condition A vs B > > 2. Input a scalar value indicating the percentage of time spent within the > stimulus area of interest on the screen (ie, 0.70 = on the stimulus for 70% > on stimulus), for each trial, and again predict whether the trial was of > condition A or B, but this time have one value per trial > > I was wondering how you would recommend approaching the two analyses > outlined above. > > Thanks so much for your help, > Bruna Martins > > > -- > *Bruna S. Martins* > * > * > Ph.D. Student- Clinical Psychology > Emotion & Cognition Lab- Gero 341 > University of Southern California > (213) 821- 5701 > > -- *Bruna S. Martins* * * Ph.D. Student- Clinical Psychology Emotion & Cognition Lab- Gero 341 University of Southern California (213) 821- 5701
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