5  Time

This chapter contains time variables.

5.1 test_year

Indicates the first year of the school year in which the testing took place. For the UK, it refers to the second year of the school year in which the testing was conducted, while for Germany it refers to the first year of the school year in which the testing was conducted. Therefore, the test year does not necessarily correspond to the actual calendar year in which the testing took place.

var_name	test_year
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

5.1.1 Relationship Between Test Wave and Test Year

Additional information on how test wave and test year relate to each other:

testwave	test year	school year de	school year uk
1	2015	-	2014/2015
2	2016	-	2015/2016
3	2017	2017/2018	2016/2017
4	2018	2018/2019	2017/2018
5	2019	2019/2020	2018/2019
6	2020	2020/2021	2019/2020
7	2021	2021/2022	2020/2021
8	2022	2022/2023	2021/2022
9	2023	2023/2024	-
10	2024	2024/2025	-
11	2025	2025/2026	-

---

5.2 test_wave

Test wave of the assessment. The test wave starts with the first data collection (wave 1) in the 2014/2015 school year in England; the first German schools were tested starting from test wave 3.

var_name	test_wave
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

---

5.3 test_date

Date of the assessment in R’s default date format. To convert the numeric value into a date in Excel, 25569 must be added to the number, and the resulting value should then be formatted as a date.

var_name	test_date
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

---

5.4 test_time

Indicates the start time of the assessment. For example, 2018-06-25:12 refers to a test that started on 25 June 2018 at 12:XX hours.

This information is not available for every dataset due to platform changes from Qualtrics to Concerto to Shiny, during which dates and times were recorded differently.

var_name	test_time
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

---

5.5 time.started

Indicates the start time of the assessment.

For example, 30.06.2016 08:20:00 means that the questionnaire was started on 30 June 2016 at 08:20. This information is not available for every dataset due to changes in the platforms from Qualtrics to Concerto to Shiny, during which dates and times were recorded differently.

var_name	time.started
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

---

5.6 time.finished

Indicates the end time of the assessment. This information is not available for every dataset due to changes in the platforms from Qualtrics to Concerto to Shiny, during which dates and times were recorded differently.

var_name	time.finished
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

---

5.7 test_duration_min

Indicates the duration of the assessment. The full test duration is only available from test wave 5 onwards, as the test was previously conducted on multiple platforms.

var_name	test_duration_min
var_stat_dyn	dynamic
var_content_group	time
var_info_type	time
item_level_data	is_no_scale
analysis_set_core	FALSE
analysis_set_extended	FALSE

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