Update README.md

README.md

@@ -1,4 +1,5 @@
 # pyfLoc
+
 A PsychoPy implementation of the Stanford VPN lab's functional localizer task.
 
 This implementation is not associated with the VPN lab, so any bugs are our own.
@@ -7,20 +8,28 @@ but the stimuli for the task must be taken from the VPN lab's [fLoc repository](
 and any use of the stimuli should include an acknowledgement in any resulting research products
 (see [here](https://github.com/VPNL/fLoc#citation)).
 
-Please download the stimuli from that repository and place them in a folder named "stimuli" in the same folder as `fLoc.py` and `config.json`.
+Please download the stimuli from that repository,
+then place them in a folder named "stimuli" in the same folder as `fLoc.py` and `config.yml`.
+Alternatively, you can use your own stimuli,
+as long as you use the appropriate folder structure and update the config file.
 
 ## Implementation information
 
-This functional localizer task uses a mini-block design with different categories of images.
+This functional localizer task uses a miniblock design with different categories of images.
 To keep participants focused on the task,
 there is also a behavioral task that participants will perform throughout the localizer.
 There are three options for this task: oddball, one-back, and two-back.
 
 The task does not include any kind of jitter.
 
+The task is set up for acquisition in an MRI,
+so each run starts when a scanner pulse is sent (i.e., the "5" key).
+
+Any button press using the buttons "1", "2", "3", or "4" counts as a response.
+
 ### Configuration
 
-You should modify the configuration file (``config.yml``) based on the following elements:
+You should modify the configuration file (`config.yml`) based on the following elements:
 
 1.  The current configuration has 4-minute runs. The VPN lab recommends acquiring at least 4 runs.
 2.  The repetition time (TR) of fMRI data for the localizer experiment must be a factor of its miniblock duration (6 s by default).