Personally, I've never understood the "touching other players after a FT" I see in games. I wouldn't want anyone touching me because I'm trying to get my FT motion working. Give me the ball so I can make an adjustment if I bricked, or keep a good thing going if I didn't.
The study included a total of 60 games played by women's basketball teams in the National Collegiate Athletic Association (NCAA) in the US. The games contained 835 incidents of two free throws.
The researchers counted how many of her four teammates touched the shooter before a shot, for example by tapping her on the shoulder or squeezing her hand. They then calculated whether there was a statistical association between the number of touches by teammates and the success rate of the subsequent shot.
The data showed that the chance of scoring rose when teammates showed their support through touch. The effect only appeared after a failed first shot. "So support from teammates is most helpful when your stress level is already high because you've missed the first of the two shots," Büttner says in summary.
https://www.sciencedaily.com/releases/2024/04/240408130746.htm