-
2
-
-
70449650287
-
Problem-solving approaches to algebra: Two aspects
-
In N. Bednarz, C. Kieran, & L. Lee (Eds.), Norwell, MA: Kluwer Academic
-
Bell, A. (1996). Problem-solving approaches to algebra: Two aspects. In N. Bednarz, C. Kieran, & L. Lee (Eds.), Approaches to algebra: Perspectives for research and teaching (pp. 167-185). Norwell, MA: Kluwer Academic.
-
(1996)
Approaches to algebra: Perspectives for research and teaching
, pp. 167-185
-
-
Bell, A.1
-
3
-
-
1842696306
-
-
San Antonio, TX: Psychological Corporation/Harcourt Brace
-
Bennet, G.K., Seashore, H.G., & Wesman, A.G. (1989). Differential aptitude tests for personnel and career assessment: Space relations. San Antonio, TX: Psychological Corporation/Harcourt Brace.
-
(1989)
Differential aptitude tests for personnel and career assessment: Space relations
-
-
Bennet, G.K.1
Seashore, H.G.2
Wesman, A.G.3
-
4
-
-
1842696306
-
-
San Antonio, TX: Psychological Corporation/Harcourt Brace
-
Bennet, G.K., Seashore, H.G., & Wesman, A.G. (1991). Differential Aptitude Tests for personnel and career assessment: Technical manual. San Antonio, TX: Psychological Corporation/Harcourt Brace.
-
(1991)
Differential Aptitude Tests for personnel and career assessment: Technical manual
-
-
Bennet, G.K.1
Seashore, H.G.2
Wesman, A.G.3
-
5
-
-
0025397298
-
Comparative fit indexes in structural models
-
Bentler, P.M. (1990). Comparative fit indexes in structural models. Psychological Bulletin, 107, 238-246.
-
(1990)
Psychological Bulletin
, vol.107
, pp. 238-246
-
-
Bentler, P.M.1
-
7
-
-
0031114556
-
Children's arithmetical difficulties: Contributions from processing speed, item identification, and short-term memory
-
Bull, R., & Johnston, R.S. (1997). Children's arithmetical difficulties: Contributions from processing speed, item identification, and short-term memory. Journal of Experimental Child Psychology, 65, 1-24.
-
(1997)
Journal of Experimental Child Psychology
, vol.65
, pp. 1-24
-
-
Bull, R.1
Johnston, R.S.2
-
8
-
-
0032925476
-
Exploring the roles of the visual-spatial sketch pad and central executive in children's arithmetical skills: Views from cognition and developmental neuropsychology
-
Bull, R., Johnston, R.S., & Roy, J.A. (1999). Exploring the roles of the visual-spatial sketch pad and central executive in children's arithmetical skills: Views from cognition and developmental neuropsychology. Developmental Neuropsychology, 15, 421-442.
-
(1999)
Developmental Neuropsychology
, vol.15
, pp. 421-442
-
-
Bull, R.1
Johnston, R.S.2
Roy, J.A.3
-
9
-
-
0035188245
-
Executive functioning as a predictor of children's mathematics ability: Inhibition, switching, and working memory
-
Bull, R., & Scerif, G. (2001). Executive functioning as a predictor of children's mathematics ability: Inhibition, switching, and working memory. Developmental Neuropsychology, 19, 273-293.
-
(2001)
Developmental Neuropsychology
, vol.19
, pp. 273-293
-
-
Bull, R.1
Scerif, G.2
-
10
-
-
0030074479
-
Inhibitory processes in sequential retrieval: Evidence from variable-lag repetition priming
-
Campbell, J.I.D., & Arbuthnott, K. (1996). Inhibitory processes in sequential retrieval: Evidence from variable-lag repetition priming. Brain and Cognition, 30, 59-80.
-
(1996)
Brain and Cognition
, vol.30
, pp. 59-80
-
-
Campbell, J.I.D.1
Arbuthnott, K.2
-
12
-
-
0031184063
-
Mediators of gender differences in mathematics college entrance test scores: A comparison of spatial skills with internalized beliefs and anxieties
-
Casey, M.B., Nuttall, R.L., & Pezaris, E. (1997). Mediators of gender differences in mathematics college entrance test scores: A comparison of spatial skills with internalized beliefs and anxieties. Developmental Psychology, 33, 669-680.
-
(1997)
Developmental Psychology
, vol.33
, pp. 669-680
-
-
Casey, M.B.1
Nuttall, R.L.2
Pezaris, E.3
-
16
-
-
33846943385
-
-
College Board, Retrieved May 16, 2007, from
-
College Board. (2005). 2005 college-bound seniors: Total group profile report. Retrieved May 16, 2007, from http://www.collegeboard.com/prod_downloads/about/news_info/cbsenior/yr2005/2005-college-bound-seniors.pdf
-
(2005)
2005 college-bound seniors: Total group profile report
-
-
-
17
-
-
0036204345
-
A latent variable analysis of working memory capacity, short-term memory capacity, processing speed, and general fluid intelligence
-
Conway, A.R.A., Cowen, N., Bunting, M.F., Therriault, D.J., & Minkoff, S.R.B. (2002). A latent variable analysis of working memory capacity, short-term memory capacity, processing speed, and general fluid intelligence. Intelligence, 30, 163-183.
-
(2002)
Intelligence
, vol.30
, pp. 163-183
-
-
Conway, A.R.A.1
Cowen, N.2
Bunting, M.F.3
Therriault, D.J.4
Minkoff, S.R.B.5
-
18
-
-
33644768093
-
Working memory span tasks: A methodological review and user's guide
-
Conway, A.R.A., Kane, M.J., Bunting, M.F., Hambrick, D.Z., Wilhelm, O., & Engle, R.W. (2005). Working memory span tasks: A methodological review and user's guide. Psychonomic Bulletin and Review, 12, 769-786.
-
(2005)
Psychonomic Bulletin and Review
, vol.12
, pp. 769-786
-
-
Conway, A.R.A.1
Kane, M.J.2
Bunting, M.F.3
Hambrick, D.Z.4
Wilhelm, O.5
Engle, R.W.6
-
19
-
-
84981263306
-
The magical number 4 in short-term memory: A reconsideration of mental storage capacity
-
Cowan, N. (2000). The magical number 4 in short-term memory: A reconsideration of mental storage capacity. Behavioral and Brain Sciences, 24, 87-185.
-
(2000)
Behavioral and Brain Sciences
, vol.24
, pp. 87-185
-
-
Cowan, N.1
-
20
-
-
0001676246
-
Enhanced problem translation and short-term memory: Components of mathematical talent
-
Dark, V.J., & Benbow, C.P. (1990). Enhanced problem translation and short-term memory: Components of mathematical talent. Journal of Educational Psychology, 82, 420-429.
-
(1990)
Journal of Educational Psychology
, vol.82
, pp. 420-429
-
-
Dark, V.J.1
Benbow, C.P.2
-
21
-
-
0041869227
-
The development of mental processing: Efficiency, working memory, and thinking
-
Demetriou, A., Christou, C., Spanoudis, G., & Platsidou, M. (2002). The development of mental processing: Efficiency, working memory, and thinking. Monographs of the Society for Research in Child Development, 67, 1-169.
-
(2002)
Monographs of the Society for Research in Child Development
, vol.67
, pp. 1-169
-
-
Demetriou, A.1
Christou, C.2
Spanoudis, G.3
Platsidou, M.4
-
23
-
-
26544444948
-
-
Princeton, NJ: Educational Testing Service
-
Ekstrom, R.B., French, J.W., Harman, H.H., & Derman, D. (1976). Manual for kit of factorreferenced cognitive tests. Princeton, NJ: Educational Testing Service.
-
(1976)
Manual for kit of factorreferenced cognitive tests
-
-
Ekstrom, R.B.1
French, J.W.2
Harman, H.H.3
Derman, D.4
-
24
-
-
0033191404
-
Working memory, shortterm memory, and general fluid intelligence: A latent-variable approach
-
Engle, R.W., Tuholski, S.W., Laughlin, J.E., & Conway, A. (1999). Working memory, shortterm memory, and general fluid intelligence: A latent-variable approach. Journal of Experimental Psychology: General, 128, 309-331.
-
(1999)
Journal of Experimental Psychology: General
, vol.128
, pp. 309-331
-
-
Engle, R.W.1
Tuholski, S.W.2
Laughlin, J.E.3
Conway, A.4
-
25
-
-
34548462314
-
Analogical reasoning and the development of algebraic abstraction
-
English, L.D., & Sharry, P.V. (1996). Analogical reasoning and the development of algebraic abstraction. Educational Studies in Mathematics, 30, 135-157.
-
(1996)
Educational Studies in Mathematics
, vol.30
, pp. 135-157
-
-
English, L.D.1
Sharry, P.V.2
-
26
-
-
3943075808
-
The contribution of executive functions to emergent mathematical skills in preschool children
-
Espy, K.A., McDiarmid, M.M., Cwik, M.F., Stalets, M.M., Hamby, A., & Senn, T.E. (2004). The contribution of executive functions to emergent mathematical skills in preschool children. Developmental Neuropsychology, 26, 465-486.
-
(2004)
Developmental Neuropsychology
, vol.26
, pp. 465-486
-
-
Espy, K.A.1
McDiarmid, M.M.2
Cwik, M.F.3
Stalets, M.M.4
Hamby, A.5
Senn, T.E.6
-
27
-
-
0037371042
-
Relations between measures of CattellHorn-Carroll cognitive abilities and mathematics achievement across the school-age years
-
Floyd, R.G., Evans, J.J., & McGrew, K.S. (2003). Relations between measures of CattellHorn-Carroll cognitive abilities and mathematics achievement across the school-age years. Psychology in the Schools, 40, 155-171.
-
(2003)
Psychology in the Schools
, vol.40
, pp. 155-171
-
-
Floyd, R.G.1
Evans, J.J.2
McGrew, K.S.3
-
28
-
-
44649142357
-
-
Project AAIMS: Algebra Assessment and Instruction - Meeting Standards Technical Report #10). Retrieved March 1, 2006, from
-
Foegen, A., Olson, J., & Perkmen, S. (2005). Reliability and criterion validity of four revised algebra measures in districts B and C (Project AAIMS: Algebra Assessment and Instruction - Meeting Standards Technical Report #10). Retrieved March 1, 2006, from http://www.ci.hs.iastate.edu/aaims/technical.html
-
(2005)
Reliability and criterion validity of four revised algebra measures in districts B and C
-
-
Foegen, A.1
Olson, J.2
Perkmen, S.3
-
29
-
-
0006803948
-
-
New York: Glencoe/McGraw-Hill
-
Foster, A.G., Winters, L.J., Gell, J.M., Rath, J.N., & Gordon, B.W. (1995). Merrill algebra 1: Applications and connections. New York: Glencoe/McGraw-Hill.
-
(1995)
Merrill algebra 1: Applications and connections
-
-
Foster, A.G.1
Winters, L.J.2
Gell, J.M.3
Rath, J.N.4
Gordon, B.W.5
-
30
-
-
84970304289
-
The space factor in mathematics: Gender differences
-
Friedman, L. (1995). The space factor in mathematics: Gender differences. Review of Educational Research, 65, 22-50.
-
(1995)
Review of Educational Research
, vol.65
, pp. 22-50
-
-
Friedman, L.1
-
32
-
-
2442529865
-
Working memory skills and educational attainment: Evidence from national curriculum assessments at 7 and 14 years of age
-
Gathercole, S.E., Pickering, S.J., Knight, C., & Stegmann, Z. (2004). Working memory skills and educational attainment: Evidence from national curriculum assessments at 7 and 14 years of age. Applied Cognitive Psychology, 18, 1-16.
-
(2004)
Applied Cognitive Psychology
, vol.18
, pp. 1-16
-
-
Gathercole, S.E.1
Pickering, S.J.2
Knight, C.3
Stegmann, Z.4
-
33
-
-
0027669890
-
Mathematical disabilities: Cognitive, neuropsychological, and genetic components
-
Geary, D.C. (1993). Mathematical disabilities: Cognitive, neuropsychological, and genetic components. Psychological Bulletin, 114, 345-362.
-
(1993)
Psychological Bulletin
, vol.114
, pp. 345-362
-
-
Geary, D.C.1
-
34
-
-
0034368172
-
Sex differences in spatial cognition, computational fluency, and arithmetical reasoning
-
Geary, D.C., Saults, S.J., Liu, F., & Hoard, M.K. (2000). Sex differences in spatial cognition, computational fluency, and arithmetical reasoning. Journal of Experimental Child Psychology, 77, 337-353.
-
(2000)
Journal of Experimental Child Psychology
, vol.77
, pp. 337-353
-
-
Geary, D.C.1
Saults, S.J.2
Liu, F.3
Hoard, M.K.4
-
35
-
-
0004914751
-
A technology-intensive functional approach to the emergence of algebraic thinking
-
In N. Bednarz, C. Kieran, & L. Lee (Eds.), Norwell, MA: Kluwer Academic
-
Heid, M.K. (1996). A technology-intensive functional approach to the emergence of algebraic thinking. In N. Bednarz, C. Kieran, & L. Lee (Eds.), Approaches to algebra: Perspectives for research and teaching (pp. 239-255). Norwell, MA: Kluwer Academic.
-
(1996)
Approaches to algebra: Perspectives for research and teaching
, pp. 239-255
-
-
Heid, M.K.1
-
36
-
-
67650706330
-
Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives
-
Hu, L.T., & Bentler, P.M. (1999). Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives. Structural Equation Modeling, 6, 1-55.
-
(1999)
Structural Equation Modeling
, vol.6
, pp. 1-55
-
-
Hu, L.T.1
Bentler, P.M.2
-
37
-
-
0009117266
-
Modeling and the initiation into algebra
-
In N. Bednarz, C. Kieran, & L. Lee (Eds.), Norwell, MA: Kluwer Academic
-
Janvier, C. (1996). Modeling and the initiation into algebra. In N. Bednarz, C. Kieran, & L. Lee (Eds.), Approaches to algebra: Perspectives for research and teaching (pp. 225-236). Norwell, MA: Kluwer Academic.
-
(1996)
Approaches to algebra: Perspectives for research and teaching
, pp. 225-236
-
-
Janvier, C.1
-
38
-
-
85055991883
-
Verbal and non-verbal working memory and achievement on National Curriculum tests at 11 and 14 years of age
-
Jarvis, H.L., & Gathercole, S.E. (2003). Verbal and non-verbal working memory and achievement on National Curriculum tests at 11 and 14 years of age. Educational and Child Psychology, 20, 123-140.
-
(2003)
Educational and Child Psychology
, vol.20
, pp. 123-140
-
-
Jarvis, H.L.1
Gathercole, S.E.2
-
40
-
-
2542636564
-
The generality of working memory capacity: A latent-variable approach to verbal and visuospatial memory span and reasoning
-
Kane, M.J., Hambrick, D.Z., Tuholski, S.W., Wilhelm, O., Payne, T.W., & Engle, R.W. (2004). The generality of working memory capacity: A latent-variable approach to verbal and visuospatial memory span and reasoning. Journal of Experimental Psychology: General, 133, 189-217.
-
(2004)
Journal of Experimental Psychology: General
, vol.133
, pp. 189-217
-
-
Kane, M.J.1
Hambrick, D.Z.2
Tuholski, S.W.3
Wilhelm, O.4
Payne, T.W.5
Engle, R.W.6
-
41
-
-
0343376045
-
Teaching and learning a new algebra with understanding
-
In E. Fennema & T. Romberg (Eds.), Mahwah, NJ: Erlbaum
-
Kaput, J.J. (1999). Teaching and learning a new algebra with understanding. In E. Fennema & T. Romberg (Eds.), Mathematics classrooms that promote understanding (pp. 133-155). Mahwah, NJ: Erlbaum.
-
(1999)
Mathematics classrooms that promote understanding
, pp. 133-155
-
-
Kaput, J.J.1
-
42
-
-
24944564120
-
Cognitive processes involved in learning school algebra
-
In P. Nesher & J. Kilpatrick (Eds.), New York: Cambridge University Press
-
Kieran, C. (1990). Cognitive processes involved in learning school algebra. In P. Nesher & J. Kilpatrick (Eds.), Mathematics and cognition (pp. 96-112). New York: Cambridge University Press.
-
(1990)
Mathematics and cognition
, pp. 96-112
-
-
Kieran, C.1
-
43
-
-
0002050688
-
The learning and teaching of school algebra
-
In D.A. Grouws (Ed.), New York: MacMillan
-
Kieran, C. (1992). The learning and teaching of school algebra. In D.A. Grouws (Ed.), Handbook of research on mathematics teaching and learning (pp. 390-414). New York: MacMillan.
-
(1992)
Handbook of research on mathematics teaching and learning
, pp. 390-414
-
-
Kieran, C.1
-
45
-
-
4544249173
-
Working memory and literacy as predictors of performance on algebraic word problems
-
Lee, K., Ng, S.-F., Ng, E.-L., & Lim, Z.-Y. (2004). Working memory and literacy as predictors of performance on algebraic word problems. Journal of Experimental Child Psychology, 89, 140-158.
-
(2004)
Journal of Experimental Child Psychology
, vol.89
, pp. 140-158
-
-
Lee, K.1
Ng, S.-F.2
Ng, E.-L.3
Lim, Z.-Y.4
-
46
-
-
84937289865
-
Working memory and school achievement in the ninth form
-
Lehto, J. (1995). Working memory and school achievement in the ninth form. Educational Psychology, 15, 271-283.
-
(1995)
Educational Psychology
, vol.15
, pp. 271-283
-
-
Lehto, J.1
-
47
-
-
2942611661
-
Measures of multivariate skewness and kurtosis with applications
-
Mardia, K.V. (1970). Measures of multivariate skewness and kurtosis with applications. Biometrika, 57, 519-530.
-
(1970)
Biometrika
, vol.57
, pp. 519-530
-
-
Mardia, K.V.1
-
48
-
-
84963473486
-
Omnibus tests of multinormality based on skewness and kurtosis
-
Mardia, K.V., & Foster, K. (1983). Omnibus tests of multinormality based on skewness and kurtosis. Communications in Statistics, 12, 207-221.
-
(1983)
Communications in Statistics
, vol.12
, pp. 207-221
-
-
Mardia, K.V.1
Foster, K.2
-
49
-
-
0001914304
-
Mathematical abstraction as the result of a delicate shift of attention
-
Mason, J. (1989). Mathematical abstraction as the result of a delicate shift of attention. For the Learning of Mathematics, 9(2), 2-8.
-
(1989)
For the Learning of Mathematics
, vol.9
, Issue.2
, pp. 2-8
-
-
Mason, J.1
-
50
-
-
3843109453
-
Expressing generality and roots in algebra
-
In N. Bednarz, C. Kieran, & L. Lee (Eds.), Norwell, MA: Kluwer Academic
-
Mason, J. (1996). Expressing generality and roots in algebra. In N. Bednarz, C. Kieran, & L. Lee (Eds.), Approaches to algebra: Perspectives for research and teaching (pp. 65-86). Norwell, MA: Kluwer Academic.
-
(1996)
Approaches to algebra: Perspectives for research and teaching
, pp. 65-86
-
-
Mason, J.1
-
51
-
-
23844468227
-
Why won't you change your mind? Knowledge of operational patterns hinders learning and performance on equations
-
McNeil, N.M., & Alibali, M.W. (2005). Why won't you change your mind? Knowledge of operational patterns hinders learning and performance on equations. Child Development, 76, 883-899.
-
(2005)
Child Development
, vol.76
, pp. 883-899
-
-
McNeil, N.M.1
Alibali, M.W.2
-
52
-
-
85047684989
-
How are visuospatial working memory, executive functioning, and spatial abilities related? A latent-variable analysis
-
Miyake, A., Friedman, N.P., Rettinger, D.A., Shah, P., & Hegarty, M. (2001). How are visuospatial working memory, executive functioning, and spatial abilities related? A latent-variable analysis. Journal of Experimental Psychology: General, 130, 621-640.
-
(2001)
Journal of Experimental Psychology: General
, vol.130
, pp. 621-640
-
-
Miyake, A.1
Friedman, N.P.2
Rettinger, D.A.3
Shah, P.4
Hegarty, M.5
-
53
-
-
0037349958
-
The multiple faces of working memory: Storage, processing, supervision, and coordination
-
Oberauer, K., Heinz-Martin, S., Wilhelm, O., & Werner, W.W. (2003). The multiple faces of working memory: Storage, processing, supervision, and coordination. Intelligence, 31, 167-193.
-
(2003)
Intelligence
, vol.31
, pp. 167-193
-
-
Oberauer, K.1
Heinz-Martin, S.2
Wilhelm, O.3
Werner, W.W.4
-
55
-
-
18344366458
-
Mathematical skills in ninth-graders: Relationships with visuo-spatial abilities and working memory
-
Reuhkala, M. (2001). Mathematical skills in ninth-graders: Relationships with visuo-spatial abilities and working memory. Educational Psychology, 21, 387-399.
-
(2001)
Educational Psychology
, vol.21
, pp. 387-399
-
-
Reuhkala, M.1
-
56
-
-
33845580602
-
Predicting academic achievement with cognitive ability
-
Rohde, T.E., & Thompson, L.A. (2007). Predicting academic achievement with cognitive ability. Intelligence, 35, 83-92.
-
(2007)
Intelligence
, vol.35
, pp. 83-92
-
-
Rohde, T.E.1
Thompson, L.A.2
-
57
-
-
23944469214
-
The role of problems and problem solving in the development of algebra
-
In N. Bednarz, C. Kieran, & L. Lee (Eds.), Norwell, MA: Kluwer Academic
-
Rojano, T. (1996). The role of problems and problem solving in the development of algebra. In N. Bednarz, C. Kieran, & L. Lee (Eds.), Approaches to algebra: Perspectives for research and teaching (pp. 55-62). Norwell, MA: Kluwer Academic.
-
(1996)
Approaches to algebra: Perspectives for research and teaching
, pp. 55-62
-
-
Rojano, T.1
-
58
-
-
0000657117
-
Math-fact retrieval as the cognitive mechanism underlying gender differences in math test performance
-
Royer, J.M., Tronsky, L.N., & Chan, Y. (1999). Math-fact retrieval as the cognitive mechanism underlying gender differences in math test performance. Contemporary Educational Psychology, 24, 181-266.
-
(1999)
Contemporary Educational Psychology
, vol.24
, pp. 181-266
-
-
Royer, J.M.1
Tronsky, L.N.2
Chan, Y.3
-
60
-
-
24944477378
-
The gains and the pitfalls of reification: The case of algebra
-
Sfard, A., & Linchevski, L. (1994). The gains and the pitfalls of reification: The case of algebra. Educational Studies in Mathematics, 26, 191-228.
-
(1994)
Educational Studies in Mathematics
, vol.26
, pp. 191-228
-
-
Sfard, A.1
Linchevski, L.2
-
62
-
-
3042796596
-
Introductory algebra: A case study of student misconceptions
-
Sleeman, D. (1986). Introductory algebra: A case study of student misconceptions. Journal of Mathematical Behavior, 5, 25-52.
-
(1986)
Journal of Mathematical Behavior
, vol.5
, pp. 25-52
-
-
Sleeman, D.1
-
63
-
-
84948889709
-
Structural model evaluation and modifications: An interval estimation approach
-
Steiger, J.H. (1990). Structural model evaluation and modifications: An interval estimation approach. Multivariate Behavioral Research, 25, 173-180.
-
(1990)
Multivariate Behavioral Research
, vol.25
, pp. 173-180
-
-
Steiger, J.H.1
-
64
-
-
33746367741
-
Math disabilities: A selective meta-analysis of the literature
-
Swanson, H.L., & Jerman, O. (2006). Math disabilities: A selective meta-analysis of the literature. Review of Educational Research, 76, 249-274.
-
(2006)
Review of Educational Research
, vol.76
, pp. 249-274
-
-
Swanson, H.L.1
Jerman, O.2
-
65
-
-
29544452455
-
An automated version of the operation span task
-
Unsworth, N., Heitz, R.P., Schrock, J., & Engle, R.W. (2005). An automated version of the operation span task. Behavior Research Methods, 37, 498-505.
-
(2005)
Behavior Research Methods
, vol.37
, pp. 498-505
-
-
Unsworth, N.1
Heitz, R.P.2
Schrock, J.3
Engle, R.W.4
-
66
-
-
0018180305
-
Mental rotations: A group test of three-dimensional spatial visualization
-
Vandenberg, S.G., & Kuse, A.R. (1978). Mental rotations: A group test of three-dimensional spatial visualization. Perceptual and Motor Skills, 47, 599-604.
-
(1978)
Perceptual and Motor Skills
, vol.47
, pp. 599-604
-
-
Vandenberg, S.G.1
Kuse, A.R.2
|