I’ve just used the method on my crib sheet successfully:
Python
myData = data.TrialHandler(nReps=1, method='sequential', extraInfo=expInfo, originPath=-1, trialList=data.importConditions('conditions.xlsx'), seed=None, name='myData')
Access individual values using: aValue = myData.trialList[Idx]['variableName']
JavaScript
myData = new TrialHandler({
psychoJS: psychoJS,
nReps: 1, method: TrialHandler.Method.SEQUENTIAL,
extraInfo: expInfo, originPath: undefined,
trialList: 'conditions.xlsx',
seed: undefined, name: 'myData'});```
https://docs.google.com/document/d/13jp0QAqQeFlYSjeZS0fDInvgaDzBXjGQNe4VNKbbNHQ/edit?usp=sharing