Для radioList указано:
А для activeListInput, activeRadioList, указано наоборот:@param array $items the data item used to generate the radio buttons.
* The array values are the labels, while the array keys are the corresponding radio button values.
То же и для ActiveField::radioList@param array $items the data item used to generate the radio buttons.
* The array keys are the labels, while the array values are the corresponding radio button values.