simResp | R Documentation |
simResp
is a function for simulating item response data.
simResp(object, theta)
## S4 method for signature 'item_1PL,numeric'
simResp(object, theta)
## S4 method for signature 'item_1PL,matrix'
simResp(object, theta)
## S4 method for signature 'item_2PL,numeric'
simResp(object, theta)
## S4 method for signature 'item_2PL,matrix'
simResp(object, theta)
## S4 method for signature 'item_3PL,numeric'
simResp(object, theta)
## S4 method for signature 'item_3PL,matrix'
simResp(object, theta)
## S4 method for signature 'item_PC,numeric'
simResp(object, theta)
## S4 method for signature 'item_PC,matrix'
simResp(object, theta)
## S4 method for signature 'item_GPC,numeric'
simResp(object, theta)
## S4 method for signature 'item_GPC,matrix'
simResp(object, theta)
## S4 method for signature 'item_GR,numeric'
simResp(object, theta)
## S4 method for signature 'item_GR,matrix'
simResp(object, theta)
## S4 method for signature 'item_pool,numeric'
simResp(object, theta)
## S4 method for signature 'item_pool,matrix'
simResp(object, theta)
## S4 method for signature 'item_pool_cluster,numeric'
simResp(object, theta)
## S4 method for signature 'item_pool_cluster,list'
simResp(object, theta)
object |
an |
theta |
theta values to use. |
nq denotes the number of theta values.
ni denotes the number of items in the item_pool
object.
item
object:simResp
returns a length nq vector containing simulated item response data.
item_pool
object:simResp
returns a (nq, ni) matrix containing simulated item response data.
Rasch, G. (1960). Probabilistic models for some intelligence and attainment tests. Copenhagen: Danish Institute for Educational Research.
Lord, F. M. (1952). A theory of test scores (Psychometric Monograph No. 7). Richmond, VA: Psychometric Corporation.
Birnbaum, A. (1957). Efficient design and use of tests of mental ability for various decision-making problems (Series Report No. 58-16. Project No. 7755-23). Randolph Air Force Base, TX: USAF School of Aviation Medicine.
Birnbaum, A. (1958). On the estimation of mental ability (Series Report No. 15. Project No. 7755-23). Randolph Air Force Base, TX: USAF School of Aviation Medicine.
Birnbaum, A. (1958). Further considerations of efficiency in tests of a mental ability (Series Report No. 17. Project No. 7755-23). Randolph Air Force Base, TX: USAF School of Aviation Medicine.
Birnbaum, A. (1968). Some latent trait models and their use in inferring an examinee's ability. In Lord, F. M., Novick, M. R. (eds.), Statistical Theories of Mental Test Scores, 397-479. Reading, MA: Addison-Wesley.
Masters, G. N. (1982). A Rasch model for partial credit scoring. Psychometrika, 47(2), 149-174.
Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43(4), 561-573.
Muraki, E. (1992). A generalized partial credit model: Application of an EM algorithm. Applied Psychological Measurement, 16(2), 159-176.
Samejima, F. (1969). Estimation of latent ability using a response pattern of graded scores. Psychometrika Monograph, 17.
item_1 <- new("item_1PL", difficulty = 0.5)
item_2 <- new("item_2PL", slope = 1.0, difficulty = 0.5)
item_3 <- new("item_3PL", slope = 1.0, difficulty = 0.5, guessing = 0.2)
item_4 <- new("item_PC", threshold = c(-1, 0, 1), ncat = 4)
item_5 <- new("item_GPC", slope = 1.2, threshold = c(-0.8, -1.0, 0.5), ncat = 4)
item_6 <- new("item_GR", slope = 0.9, category = c(-1, 0, 1), ncat = 4)
sim_item_1 <- simResp(item_1, seq(-3, 3, 1))
sim_item_2 <- simResp(item_2, seq(-3, 3, 1))
sim_item_3 <- simResp(item_3, seq(-3, 3, 1))
sim_item_4 <- simResp(item_4, seq(-3, 3, 1))
sim_item_5 <- simResp(item_5, seq(-3, 3, 1))
sim_item_6 <- simResp(item_6, seq(-3, 3, 1))
sim_pool <- simResp(itempool_science, seq(-3, 3, 1))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.