update task and beh pages

src/modality-specific-files/behavioral-experiments.md

@@ -1,5 +1,11 @@
 # Behavioral experiments (with no neural recordings)
 
+!!! example "Example datasets"
+
+    Datasets containing behavioral data can be found
+    in the [BIDS examples repository](https://bids-standard.github.io/bids-examples/#behavioral)
+    and can be used as helpful guidance when curating new datasets.
+
 <!--
 This block generates a filename templates.
 The inputs for this macro can be found in the directory
@@ -9,17 +15,20 @@ and a guide for using macros can be found at
 -->
 {{ MACROS___make_filename_template("raw", datatypes=["beh"]) }}
 
-In addition to logs from behavioral experiments performed alongside imaging data
-acquisitions, one can also include data from experiments performed with no neural
-recordings.
-The results of those experiments can be stored in the `beh` directory using the same
-formats for event timing (`_events.tsv`), metadata (`_events.json`),
+In addition to logs from behavioral experiments
+performed alongside imaging data acquisitions,
+one MAY also include data from experiments
+performed with no neural recordings.
+The results of those experiments MAY be stored in the `beh` directory
+using the same formats for event timing (`_events.tsv`),
+metadata (`_events.json`),
 physiological (`_physio.tsv.gz`, `_physio.json`)
 and other continuous recordings (`_stim.tsv.gz`, `_stim.json`)
 as for tasks performed during MRI, electrophysiological or other neural recordings.
-Additionally, events files that do not include the mandatory `onset` and
-`duration` columns can still be included, but should be labeled `_beh.tsv`
-rather than `_events.tsv`.
+Additionally, events files
+that do not include the mandatory `onset` and `duration` columns
+MAY be included,
+but SHOULD be labeled `_beh.tsv` rather than `_events.tsv`.
 
 ## Sidecar JSON (`*_beh.json`)
 
@@ -30,7 +39,7 @@ In addition to the metadata that is either:
 -   REQUIRED for some data that can be found in the `beh` directory
     (for example `SamplingFrequency` and `StartTime` for `*_<physio|stim>.tsv.gz` files),
 
-it is RECOMMENDED to add the following metadata to the JSON files of this directory.
+It is RECOMMENDED to add the following metadata to the JSON files of this directory.
 
 ### Task information
 

src/modality-specific-files/task-events.md

@@ -27,9 +27,9 @@ Each task events file REQUIRES a corresponding task data file.
 It is also possible to have a single `events.tsv` file describing events
 for all participants and runs (see
 [Inheritance Principle](../common-principles.md#the-inheritance-principle)).
-As with all other tabular data, `events.tsv` files MAY be accompanied by a JSON
-file describing the columns in detail (see
-[Tabular Files](../common-principles.md#tabular-files)).
+As with all other tabular data, `events.tsv` files MAY be accompanied
+by a JSON file describing the columns in detail
+(see [Tabular Files](../common-principles.md#tabular-files)).
 
 The tabular files consists of one row per event and a set of REQUIRED
 and OPTIONAL columns:
@@ -42,22 +42,26 @@ and a guide for using macros can be found at
 -->
 {{ MACROS___make_columns_table("task.TaskEvents") }}
 
-Note for MRI data:
-If any acquired scans have been discarded before forming the imaging data file,
-ensure that an `onset` of 0 corresponds to the time the first image was stored.
-For example in case there is an in scanner training phase that
-begins before the scanning sequence has started events from this sequence should
-have negative onset time counting down to the beginning of the acquisition of
-the first volume.
-
-Note regarding the precision of numeric metadata:
-It is RECOMMENDENDED that dataset curators specify numeric metadata like `onset` and
-`duration` with as much decimal precision as is reasonable in the context of the experiment.
-For example in an EEG experiment with devices operating at 1000 Hz sampling frequency,
-dataset curators SHOULD specify **at least** 3 figures after the decimal point.
-
-An arbitrary number of additional columns can be added. Those allow describing
-other properties of events that could be later referenced in modeling and
+!!! note "For fMRI data"
+
+    For fMRI data
+    if any acquired scans have been discarded before forming the imaging data file,
+    ensure that an `onset` of 0 corresponds to the time the first image was stored.
+    For example in case there is an in scanner training phase that
+    begins before the scanning sequence has started events from this sequence should
+    have negative onset time counting down to the beginning of the acquisition of
+    the first volume.
+
+!!! note "Regarding the precision of numeric metadata"
+
+    For the precision of numeric metadata,
+    it is RECOMMENDENDED that dataset curators specify numeric metadata like `onset` and
+    `duration` with as much decimal precision as is reasonable in the context of the experiment.
+    For example in an EEG experiment with devices operating at 1000 Hz sampling frequency,
+    dataset curators SHOULD specify **at least** 3 figures after the decimal point.
+
+An arbitrary number of additional columns can be added.
+Those allow describing other properties of events that could be later referenced in modeling and
 hypothesis extensions of BIDS.
 Note that the `trial_type` and any additional columns in a TSV file
 SHOULD be documented in an accompanying JSON sidecar file.
@@ -117,24 +121,26 @@ In the accompanying JSON sidecar, the `trial_type` column might look as follows:
 }
 ```
 
-Note that in the example above:
+!!! note
 
-1.  Only a subset of columns are described for the sake of brevity.
-    In a real dataset, all other columns SHOULD also be described.
+    In the example above:
 
-1.  The `channel` column contains a list of values that are separated
-    by a delimiter (`|`), as is declared in the `Delimiter` metadata
-    field of the `events.json file.
-    Thus, the channels related to the event in the third row of the example
-    are called `F,1`, `F,2`, and `Cz`.
+    1.  Only a subset of columns are described for the sake of brevity.
+        In a real dataset, all other columns SHOULD also be described.
 
-1.  The example contains a column called `annots`.
-    This column is not defined in BIDS, and constitutes additional, arbitrary
-    (that is, unofficial) metadata.
-    In the present case, it is used to describe artifacts in the data,
-    in reference to the `channel` column.
-    The `annots` column is making
-    use of the powerful HED system for documenting events, see below.
+    1.  The `channel` column contains a list of values that are separated
+        by a delimiter (`|`), as is declared in the `Delimiter` metadata
+        field of the `events.json file.
+        Thus, the channels related to the event in the third row of the example
+        are called `F,1`, `F,2`, and `Cz`.
+
+    1.  The example contains a column called `annots`.
+        This column is not defined in BIDS, and constitutes additional, arbitrary
+        (that is, unofficial) metadata.
+        In the present case, it is used to describe artifacts in the data,
+        in reference to the `channel` column.
+        The `annots` column is making
+        use of the powerful HED system for documenting events, see below.
 
 Events MAY also be documented in machine-actionable form
 using HED (Hierarchical Event Descriptor) tags.
@@ -143,8 +149,8 @@ in event-related analyses.
 See [Hierarchical Event Descriptors](../appendices/hed.md)
 for additional information and examples.
 
-For multi-echo files, the `events.tsv` file is applicable to all echos of
-a particular run:
+For multi-echo files, the `events.tsv` file is applicable
+to all echos of a particular run:
 
 <!-- This block generates a file tree.
 A guide for using macros can be found at
@@ -186,8 +192,6 @@ References to existing databases can also be encoded using additional columns.
 The following example includes references to the
 [Karolinska Directed Emotional Faces (KDEF) database](https://www.kdef.se/).
 
-Example:
-
 <!-- This block generates a file tree.
 A guide for using macros can be found at
  https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
@@ -233,8 +237,8 @@ in the accompanying JSON sidecar as follows:
 }
 ```
 
-Note that all other columns SHOULD also be described but are omitted for the
-sake of brevity.
+Note that all other columns SHOULD also be described but are omitted
+for the sake of brevity.
 
 ### Stimulus presentation details