Event-Related SCR Analysis

Performs event-related skin conductance response (ER-SCR) analysis by extracting SCR features time-locked to experimental events. For each event, the function searches for an SCR onset within a specified window and, if found, computes amplitude, latency, rise time, and 50 percent recovery time.

Usage

edaErscr(
  x,
  event_type = NULL,
  onset_window = c(1, 4),
  peak_window = c(0.5, 5),
  amplitude_min = 0.01,
  assay_name = NULL
)

Arguments

x: A PhysioExperiment object containing EDA data and events.
event_type: Character string specifying the event type to analyze. If NULL (default), all events are used.
onset_window: Numeric vector of length 2 giving the valid SCR onset latency window in seconds relative to event onset (default: c(1, 4)).
peak_window: Numeric vector of length 2 giving the minimum and maximum time from SCR onset to peak in seconds (default: c(0.5, 5)).
amplitude_min: Minimum SCR amplitude in microsiemens to be considered a valid response (default: 0.01).
assay_name: Name of the assay to use. If NULL, uses "phasic" if available, otherwise the default assay.

Value

A data.frame with one row per event per channel containing columns:

event_index: Integer index of the event.
event_onset: Numeric onset time of the event in seconds.
channel: Character name of the channel.
scr_present: Logical indicating whether a valid SCR was detected.
scr_amplitude: Numeric SCR amplitude (peak minus onset), or NA.
scr_latency: Numeric latency from event to SCR onset in seconds, or NA.
scr_rise_time: Numeric time from SCR onset to peak in seconds, or NA.
scr_recovery_time: Numeric time for 50 percent recovery from peak, or NA.

References

Bach, D.R., et al. (2010). "Modelling event-related skin conductance responses." International Journal of Psychophysiology, 75(3), 349-356. doi:10.1016/j.ijpsycho.2010.01.005

Usage

Arguments

Value

References

See also