Yep, effort\achievement shouldn't be considered as independent. What I do think is important is to kill dead this notion that achievement is not a necessary con

Yep, effort\achievement shouldn't be considered as independent. What I do think is important is to kill dead this notion that achievement is not a necessary consideration for how to praise. For example: I would be cautious about praising: i) High effort but low performance due to repeating mistakes that have been pointed out before. ii) Low effort but high performance due to luck or the task being easy for the individual. I would find it important to praise: i) Low effort but improved performance due to a change in behaviour e.g. learning from previous experience. ii) High effort but low performance due to how novel or ambitiously challenging the task is for the individual.