Computes the index of the peak acceleration of a trajectory, defined by vectors of x and y coordinates, and assumed to be equidistant in time.

## Arguments

- x_vector
x-coordinates of the executed path.

- y_vector
y-coordinates of the executed path.

- absolute
Should negative accelerations (i.e., deceleration) be included? Defaults to

`FALSE`

.

## References

Wirth, R., Foerster, A., Kunde, W., & Pfister, R. (2020). Design choices: Empirical recommendations for designing two-dimensional finger tracking experiments. Behavior Research Methods, 52, 2394 - 2416. doi:10.3758/s13428-020-01409-0