personality_sum_scores_neo
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personality_sum_scores_neo [2021/08/30 13:51] laura [Table] |
personality_sum_scores_neo [2021/08/31 12:43] (current) simone [Calculation sum scores] |
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| ====== Personality sum scores (NEO) ====== | ====== Personality sum scores (NEO) ====== | ||
| - | Researchers from the [[https://www.rug.nl/staff/l.schweren/research|University Medical Center Groningen]] and the [[https://research.vumc.nl/en/persons/sophia-van-der-sluis|Amsterdam University Medical Center]] calculated scores for several facets and five factor inventory (FFI) scales of the [[personality_neo|Personality (NEO)]] from participants aged 18-65 at [[1a_questionnaire_2|1A questionnaire 2]]. Lifelines combined these scores to create one personality sum score. ([[sections]]: [[mental health]] ([[personality_neo|Personality (NEO)]]) and [[secondary & linked variables]]).\\ | + | Researchers from the [[https://www.rug.nl/staff/l.schweren/research|University Medical Center Groningen]] and the [[https://research.vumc.nl/en/persons/sophia-van-der-sluis|Amsterdam University Medical Center]] calculated scores for several facets and five factor inventory (FFI) domains of the [[personality_neo|Personality (NEO)]] from participants aged 18-65 at [[1a_questionnaire_2|1A questionnaire 2]]. Lifelines combined these calculations. ([[sections]]: [[mental health]] ([[personality_neo|Personality (NEO)]]) and [[secondary & linked variables]])\\ |
| The personality sum scores (NEO) can be requested in the Lifelines catalogue or by mail (data@lifelines.nl).\\ | The personality sum scores (NEO) can be requested in the Lifelines catalogue or by mail (data@lifelines.nl).\\ | ||
| + | \\ | ||
| ===== Background ===== | ===== Background ===== | ||
| In Lifelines, selected items of the [[personality_neo|NEO-PI-R]] were administered. Initially, 64 items (8 items belonging to 8 personality facets) were administered. At some point during the data collection process (approximately 80% of the sample had already taken part at that point), the following specific items were added: | In Lifelines, selected items of the [[personality_neo|NEO-PI-R]] were administered. Initially, 64 items (8 items belonging to 8 personality facets) were administered. At some point during the data collection process (approximately 80% of the sample had already taken part at that point), the following specific items were added: | ||
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| * All missing FFI items for the conscientiousness domain, such that now we have an FFI estimation of the conscientiousness domain total score | * All missing FFI items for the conscientiousness domain, such that now we have an FFI estimation of the conscientiousness domain total score | ||
| * All missing FFI items for the extraversion domain, such that now we have an FFI estimation of the extraversion domain total score. Unfortunately, by mistake, one FFI item of the Extraversion domain was not included in the updated questionnaire. \\ | * All missing FFI items for the extraversion domain, such that now we have an FFI estimation of the extraversion domain total score. Unfortunately, by mistake, one FFI item of the Extraversion domain was not included in the updated questionnaire. \\ | ||
| + | \\ | ||
| ===== Calculation sum scores ===== | ===== Calculation sum scores ===== | ||
| - | The calculation of the personality sum scores consisted of two steps. The first being data preparation and the second the calculation of the actual sum scores. | + | The calculation of the personality sum scores consisted of two steps. The first being data preparation and the second is the calculation of the actual sum scores of the different facets and the domains. |
| === Preparation === | === Preparation === | ||
| - | First, the variables for each facet and FFI domain were named according to their facet/domain (e.g. C1-C8 for the competence facet). Additionally, some items of the questionnaire should be reversed in order to calculate an appropriate sum score. A detailed overview of the variables per facet/domain and the items that are reversed can be found in the syntax on the Lifelines workspace. | + | First, the variables for each facet and FFI domain were named according to their facet/domain (e.g. C1-C8 for the competence facet). Additionally, some items of the questionnaire were reversed to calculate an appropriate sum score. A detailed overview of the variables per facet/domain and the items that are reversed can be found in the syntax on the Lifelines workspace. |
| Finally, variables have been created indicating the number of valid answers per facet and domain.\\ | Finally, variables have been created indicating the number of valid answers per facet and domain.\\ | ||
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| - A sum score for all participants with complete data (no missing items) -> variable name //neocomplete_....// | - A sum score for all participants with complete data (no missing items) -> variable name //neocomplete_....// | ||
| - A sum score for the available items for all participants -> variable name //neovalid_...// | - A sum score for the available items for all participants -> variable name //neovalid_...// | ||
| - | - A sum score for all participants with at least one valid item, with missing items imputed to the mean of all non-missing items //neoinputed_...// | + | - A sum score for all participants with at least one valid item, with missing items imputed to the mean of all non-missing items -> variable name //neoimputed_...// |
| - | + | ||
| - | Besides the different sum scores, the number of valid items is provided. Enabling everyone to | + | |
| + | Besides the different sum scores, the number of valid items is provided. Enabling everyone to decide how many valid answers is enough to include a sum score.\\ | ||
| === Remarks === | === Remarks === | ||
| - | total facet = 8, total FFI = 12 | + | * The total number of items for a facet is 8, for a domain this is 12. As a result, the sum score for facets ranges from 0-40 and for the domains from 0-60. |
| - | o SUM1 for Extraversion as one variable is missing (11 vs 12 items)!! | + | * The FFI item extraversion has one missing question. As a result, no sum score item number 1 has been calculated (as there is always at least one missing question). |
| - | Note that even in the old versions of the questionnaire, i.e. before adding the missing FFI items, the questionnaire did already contain some FFI items: 5 out of 12 FFI neuroticism items, 3 out of 12 FFI conscientiousness items, and 1 out of 12 FFI extraversion items. Therefore, FFI SUM2 and FFI SUM3 are calculated even for subjects who were administered an old version of the questionnaire. Thus, any researcher using these scores must always check the number of missing items per scale and set his/her own threshold for missingness. | + | * Even though all FFI items have been included in only part of the questionnaires, the FFI sum scores have been calculated for all domains. This has been decided because before adding the missing items, the questionnaire did already contain some FFI items. |
| \\ | \\ | ||
| ===== Article ===== | ===== Article ===== | ||
| - | * ...\\ | + | * [[https://doi.org/10.1016/j.clnu.2020.06.016| Schweren, L. J., Larsson, H., Vinke, P. C., Li, L., Kvalvik, L. G., Arias-Vasquez, A., ... & Hartman, C. A. (2021). Diet quality, stress and common mental health problems: A cohort study of 121,008 adults. Clinical Nutrition, 40(3), 901-906. https://doi.org/10.1016/j.clnu.2020.06.016]] \\ |
| + | \\ | ||
| ===== Variables ===== | ===== Variables ===== | ||
| | **Label English** | **Label Dutch** | **Code** | **Variable** | **Assessment** | **Age** | | | **Label English** | **Label Dutch** | **Code** | **Variable** | **Assessment** | **Age** | | ||
personality_sum_scores_neo.1630324294.txt.gz · Last modified: 2021/08/30 13:51 by laura
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