Pep-talks can be applied to groups or individuals. 

The group pep-talk

• Typically less interactive 1-way communication 
• You have a good sense for what the people think & feel
• The barriers (or enemy) are well defined 
• The challenge is clear 

The 1-on-1 pep-talk

• Should be an interactive, 2-way conversation
• You may sense something is wrong 
• Not sure what they're thinking or feeling 
• Barriers and challenges are unclear