function [RHO_id_group, time]=loadwithbet(folder, partis)

counter=1;

for ppp=1:length(partis)
  counterf=1;

    for fff=1:4
  toload=[folder{fff}, partis{ppp,:},'.mat']
  load(toload)
  
  for item =1:3
      
  bi=(1:3~=item);
  if fff<3
  wi=RSA_obj_rot.trialinfo.object_1_id==item;
  else
  wi=RSA_obj_rot.trialinfo.object_2_id==item;
  end
  
  within(item,:)=squeeze(nanmean(RSA_obj_rot.rho(wi,item,:),1));  
  between(item,:)=squeeze(nanmean(nanmean(RSA_obj_rot.rho(wi,bi,:),2),1));
  
  end
  
  RHO_id_group{counterf}(:,counter)=nanmean(within,1);
  counterf=counterf+1;
  RHO_id_group{counterf}(:,counter)=nanmean(between,1);
  counterf=counterf+1;
  RHO_id_group{counterf}(:,counter)=nanmean(within,1)-nanmean(between,1)
  counterf=counterf+1;

    end
     
  counter=counter+1;

end

time=RSA_obj_rot.time;

end