{ "id": 14997, "title": "What is the difference between trial and series?", "url": "/competitions/grasp-and-lift-eeg-detection/discussion/14997", "author_name": "", "post_date": "2015-07-02T05:33:57.553Z", "votes": null, "comment_count": 6, "views": 863, "content": "

I have found the following line in Data page.

\n

There are 12 subjects in total, 10 series of trials for each subject, and approximately 30 trials within each series.

\n

It seems subject refers to person here, but what is the meaning of trial and series?

\n

 

", "messages": [ { "id": "83174", "postDate": "07/02/2015 05:33:57", "content": "

I have found the following line in Data page.

\n

There are 12 subjects in total, 10 series of trials for each subject, and approximately 30 trials within each series.

\n

It seems subject refers to person here, but what is the meaning of trial and series?

\n

 

", "rawMarkdown": "", "votes": null }, { "id": "83180", "postDate": "07/02/2015 06:52:39", "content": "

Subjects are persons indeed. Each series is one recording session in which the subject had to perform about 30 grasp-and-lifts (trials)

", "rawMarkdown": "", "votes": null }, { "id": "83490", "postDate": "07/05/2015 23:14:30", "content": "

So within each series, there will be multiple event cycles, (several handstarts, several liftoffs) since they are doing multiple trials in each series. Is this correct ?

", "rawMarkdown": "", "votes": null }, { "id": "83493", "postDate": "07/06/2015 00:03:10", "content": "

yes, a trial is a full sequence of the 6 events. On the Data page, there is a video of a trial. it is a full sequence from the moment the hand start moving until the hand came back to the original point.

", "rawMarkdown": "", "votes": null }, { "id": "85641", "postDate": "07/16/2015 05:22:17", "content": "

Hi Guys !!

\n\n

Just started exploring the data today and I have some questions with regards to the six events which encompass to form a trial. I get the fact that each trial is a sequence of 6 events !!

\n\n

QUERY1

\n\n

Are the events overlapping in time (especially events FirstDigitTouch and BothStartLoadPhase?)..Plot of the events attached with six different colors seems to convey that :)

\n\n

QUERY2\nI guess the each event is around 150 samples if I got it right :)

\n\n

Looking forward to your replys !!

\n\n

Thanks\nNavin

", "rawMarkdown": "Hi Guys !!\r\n\r\nJust started exploring the data today and I have some questions with regards to the six events which encompass to form a trial. I get the fact that each trial is a sequence of 6 events !!\r\n\r\n***QUERY1***\r\n\r\nAre the events overlapping in time (especially events FirstDigitTouch and BothStartLoadPhase?)..Plot of the events attached with six different colors seems to convey that :)\r\n\r\n**QUERY2**\r\nI guess the each event is around 150 samples if I got it right :)\r\n\r\nLooking forward to your replys !!\r\n\r\nThanks\r\nNavin", "votes": null }, { "id": "1656774", "postDate": "01/19/2022 16:07:35", "content": "

@alexandrebarachant I was curious to know how to interpret the shape of the data.
\nWhen I looked at the series 6 data for subject 1, I got a shape of 249550 rows × 32 columns. I understand that 32 columns indicate the 32 different EEG channels. But what does the number 249550 represent ? How can it be tied to the fact that there are 8 series (for training) and 30 trials in each series. This makes a total of 8x30x6 = 1440 events in one session.
\nThanks!

", "rawMarkdown": "alexandrebarachant I was curious to know how to interpret the shape of the data.\nWhen I looked at the **series 6 data** for **subject 1**, I got a shape of **249550 rows × 32 columns**. I understand that 32 columns indicate the **32 different EEG channels**. But what does the number 249550 represent ? How can it be tied to the fact that there are 8 series (for training) and 30 trials in each series. This makes a total of 8x30x6 = 1440 events in one session.\nThanks!", "votes": null }, { "id": "2590722", "postDate": "01/07/2024 12:00:07", "content": "

how can be two events overlap? event should be distinct. yes i am also getting same plot

", "rawMarkdown": "how can be two events overlap? event should be distinct. yes i am also getting same plot", "votes": null } ], "comments": [ { "id": 1656774, "author_name": "venkateshkulkarni11", "author_url": "", "post_date": "01/19/2022 16:07:35", "content": "

@alexandrebarachant I was curious to know how to interpret the shape of the data.
\nWhen I looked at the series 6 data for subject 1, I got a shape of 249550 rows × 32 columns. I understand that 32 columns indicate the 32 different EEG channels. But what does the number 249550 represent ? How can it be tied to the fact that there are 8 series (for training) and 30 trials in each series. This makes a total of 8x30x6 = 1440 events in one session.
\nThanks!

", "votes": null, "replies": [] }, { "id": 83180, "author_name": "qwlouse", "author_url": "", "post_date": "07/02/2015 06:52:39", "content": "

Subjects are persons indeed. Each series is one recording session in which the subject had to perform about 30 grasp-and-lifts (trials)

", "votes": null, "replies": [] }, { "id": 83490, "author_name": "chrisfs", "author_url": "", "post_date": "07/05/2015 23:14:30", "content": "

So within each series, there will be multiple event cycles, (several handstarts, several liftoffs) since they are doing multiple trials in each series. Is this correct ?

", "votes": null, "replies": [] }, { "id": 83493, "author_name": "alexandrebarachant", "author_url": "", "post_date": "07/06/2015 00:03:10", "content": "

yes, a trial is a full sequence of the 6 events. On the Data page, there is a video of a trial. it is a full sequence from the moment the hand start moving until the hand came back to the original point.

", "votes": null, "replies": [] }, { "id": 85641, "author_name": "navingupta", "author_url": "", "post_date": "07/16/2015 05:22:17", "content": "

Hi Guys !!

\n\n

Just started exploring the data today and I have some questions with regards to the six events which encompass to form a trial. I get the fact that each trial is a sequence of 6 events !!

\n\n

QUERY1

\n\n

Are the events overlapping in time (especially events FirstDigitTouch and BothStartLoadPhase?)..Plot of the events attached with six different colors seems to convey that :)

\n\n

QUERY2\nI guess the each event is around 150 samples if I got it right :)

\n\n

Looking forward to your replys !!

\n\n

Thanks\nNavin

", "votes": null, "replies": [ { "id": 2590722, "author_name": "sayaneecsbme", "author_url": "", "post_date": "01/07/2024 12:00:07", "content": "

how can be two events overlap? event should be distinct. yes i am also getting same plot

", "votes": null, "replies": [] } ] } ], "raw_markdown_by_id": { "83174": "", "83180": "", "83490": "", "83493": "", "85641": "Hi Guys !!\r\n\r\nJust started exploring the data today and I have some questions with regards to the six events which encompass to form a trial. I get the fact that each trial is a sequence of 6 events !!\r\n\r\n***QUERY1***\r\n\r\nAre the events overlapping in time (especially events FirstDigitTouch and BothStartLoadPhase?)..Plot of the events attached with six different colors seems to convey that :)\r\n\r\n**QUERY2**\r\nI guess the each event is around 150 samples if I got it right :)\r\n\r\nLooking forward to your replys !!\r\n\r\nThanks\r\nNavin", "1656774": "alexandrebarachant I was curious to know how to interpret the shape of the data.\nWhen I looked at the **series 6 data** for **subject 1**, I got a shape of **249550 rows × 32 columns**. I understand that 32 columns indicate the **32 different EEG channels**. But what does the number 249550 represent ? How can it be tied to the fact that there are 8 series (for training) and 30 trials in each series. This makes a total of 8x30x6 = 1440 events in one session.\nThanks!", "2590722": "how can be two events overlap? event should be distinct. yes i am also getting same plot" }, "source": "meta" }