Variable Name	Type of variable 	Construct	Variable description	Time point	Age	Data type	Allowed scores	Measure Reported in:
UnlinkedParticipantNumber	Random	Unlinked Participant Number	Random number not linked to any other dataset	All	All	Dummy	1-9999	.
ParEd_M_T6	Observed	Parent Education Level	Mother top qualification Time 6	6	11	Categorical	"higher degree = 1, UG=2, Alevel=3, GCSE=4, Vocational=5, Unknown=6"	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
ParEd_F_T6	Observed	Parent Education Level	Father top qualification Time 6	6	11	Categorical	"higher degree = 1, UG=2, Alevel=3, GCSE=4, Vocational=5, Unknown=6"	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T1BAS_word_reading	Observed	Word reading	British Ability Scales 2 Word Reading Time 1	1	4	Continuous	0-90	.
T1DTWRPnonwords	Observed	Word reading	Diagnostic Test of Word Reading Processes Nonword Reading Time 1	1	4	Continuous	0-30	.
T1DTWRPexception	Observed	Word reading	Diagnostic Test of Word Reading Processes Exception Word Reading Time 1	1	4	Continuous	0-30	.
T1DTWRPregular	Observed	Word reading	Diagnostic Test of Word Reading Processes Regular Word Reading Time 1	1	4	Continuous	0-30	.
T2BAS_word_reading	Observed	Word reading	British Ability Scales 2 Word Reading Time 2	2	5	Continuous	0-90	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T2DTWRPnonwords	Observed	Word reading	Diagnostic Test of Word Reading Processes Nonword Reading Time 2	2	5	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T2DTWRPexception	Observed	Word reading	Diagnostic Test of Word Reading Processes Exception Word Reading Time 2	2	5	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T2DTWRPregular	Observed	Word reading	Diagnostic Test of Word Reading Processes Regular Word Reading Time 2	2	5	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T3BAS_word_reading	Observed	Word reading	British Ability Scales 2 Word Reading Time 3	3	6	Continuous	0-90	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T3DTWRPnonwords	Observed	Word reading	Diagnostic Test of Word Reading Processes Nonword Reading Time 3	3	6	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T3DTWRPexception	Observed	Word reading	Diagnostic Test of Word Reading Processes Exception Word Reading Time 3	3	6	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T3DTWRPregular	Observed	Word reading	Diagnostic Test of Word Reading Processes Regular Word Reading Time 3	3	6	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T4DTWRP_nonwords	Observed	Word reading	Diagnostic Test of Word Reading Processes Nonword Reading Time 4	4	9	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T4DTWRP_exception	Observed	Word reading	Diagnostic Test of Word Reading Processes Exception Word Reading Time 4	4	9	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T4DTWRP_regular	Observed	Word reading	Diagnostic Test of Word Reading Processes Regular Word Reading Time 4	4	9	Continuous	0-30	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T4BAS_word_reading	Observed	Word reading	British Ability Scales 2 Word Reading Time 4	4	9	Continuous	0-90	Dynamic relationships between phonological memory and reading: A five year longitudinal study from age 4 to 9 - Cunningham - 2021 - Developmental Science - Wiley Online Library
T5DTWRPnonwords	Observed	Word reading	Diagnostic Test of Word Reading Processes Nonword Reading Time 5	5	10	Continuous	0-30	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T5DTWRPException	Observed	Word reading	Diagnostic Test of Word Reading Processes Exception Word Reading Time 5	5	10	Continuous	0-30	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T5_PhonemicDecoding	Observed	Reading Efficiency	Test of Word Reading Processes Phonemic Decoding Efficiency Time 5	5	10	Continuous	0-66	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T5_SightWordEfficiency	Observed	Reading Efficiency	Test of Word Reading Processes Sight Word Efficiency Time 5	5	10	Continuous	0-108	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T5BASwordreading	Observed	Word reading	British Ability Scales 2 Word Reading Time 5	5	10	Continuous	0-90	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T6_DTWRPnonwords	Observed	Word reading	Diagnostic Test of Word Reading Processes Nonword Reading Time 6	6	11	Continuous	0-30	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T6_DTWRPException	Observed	Word reading	Diagnostic Test of Word Reading Processes Exception Word Reading Time 6	6	11	Continuous	0-30	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T6_SightWordEfficiency	Observed	Reading Efficiency	Test of Word Reading Processes Phonemic Decoding Efficiency Time 6	6	11	Continuous	0-66	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T6_PhonemicDecoding	Observed	Reading Efficiency	Test of Word Reading Processes Sight Word Efficiency Time 6	6	11	Continuous	0-108	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T6_YARCpassage1Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 6 Passage 1	6	11	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T6_YARCpassage2Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 6 Passage 1	6	11	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T7_SightWordEfficiency	Observed	Reading Efficiency	Test of Word Reading Processes Sight Word Efficiency Time 7	7	11	Continuous	0-66	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T7_PhonemicDecoding	Observed	Reading Efficiency	Test of Word Reading Processes Phonemic Decoding Efficiency Time 7	7	11	Continuous	0-108	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T7_YARCpassage_1_Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 7 Passage 1	7	11	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T7_YARCpassage_2_Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 7 Passage 2	7	11	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T8_SightWordEfficiency	Observed	Reading Efficiency	Test of Word Reading Processes Sight Word Efficiency Time 8	8	12	Continuous	0-66	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T8_PhonemicDecoding	Observed	Reading Efficiency	Test of Word Reading Processes Phonemic Decoding Efficiency Time 8	8	12	Continuous	0-108	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T8_YARCpassage1Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 8 Passage 1	8	12	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T8_YARCpassage2Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 8 Passage 2	8	12	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T9_SightWordEfficiency	Observed	Reading Efficiency	Test of Word Reading Processes Sight Word Efficiency Time 9	9	12	Continuous	0-66	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T9_PhonemicDecoding	Observed	Reading Efficiency	Test of Word Reading Processes Phonemic Decoding Efficiency Time 9	9	12	Continuous	0-108	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library
T9_YARC_passage_2_Comprehension	Observed	Reading comprehension	York Assessment of Reading for Comprehension Passage Reading Test Time 9 Passage 2	9	12	Continuous	0-26	Tracking vocabulary and reading growth in children from lower and higher socioeconomic backgrounds during the transition from primary to secondary education - Kleij - 2023 - Child Development - Wiley Online Library