When it comes to developing skills, immediate praise works better than threat of future punishment.

Make it a daily habit to notice progress.

Praise behaviors you want your team to repeat.

Bad behaviors capture your attention.

Search for something to praise.

When you point out something that isn’t working, turn toward the future.

Focus on behaviors that cause improvement. Threat isn’t enough.

Source - Read More at: leadershipfreak.blog

Fascinating article, supported by research, that shows that POSITIVE REINFORCEMENT results in higher performance than threats and  punitive actions. 

Just as when raising children, catching them doing something well, and rewarding that behavior, ultimately results in overall better behavior/performance than negative based supervision.