diff --git a/R/readdesign.R b/R/readdesign.R
index 0545dc4e3d0b7e2582c35f8f454d6adc8b58d809..2b7bf8298875bdd5b4a6f723ee3b70ede3cba4c3 100644
--- a/R/readdesign.R
+++ b/R/readdesign.R
@@ -1,7 +1,7 @@
 #'  Creates a dataframe with the design.
 #'
 #' @param design The path to a design file
-#' @param designtype Is it a design created with ngene or with spdesign. Ngene desings should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.
+#' @param designtype Is it a design created with ngene, spdesign or idefix. use 'ngene', 'spdesign' or 'idefix. Ngene designs should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. Idefix objects should also be stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.
 #' @param destype Deprecated. Use designtype instead.
 #' @return a dataframe
 #' @export
diff --git a/man/readdesign.Rd b/man/readdesign.Rd
index a393fc84e902eea0f6b734e52d467e4cce9ed039..36e4648c93d0c4c389e4df83d08398dfc54b4c68 100644
--- a/man/readdesign.Rd
+++ b/man/readdesign.Rd
@@ -9,7 +9,7 @@ readdesign(design = designfile, designtype = NULL, destype = NULL)
 \arguments{
 \item{design}{The path to a design file}
 
-\item{designtype}{Is it a design created with ngene or with spdesign. Ngene desings should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.}
+\item{designtype}{Is it a design created with ngene, spdesign or idefix. use 'ngene', 'spdesign' or 'idefix. Ngene designs should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. Idefix objects should also be stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.}
 
 \item{destype}{Deprecated. Use designtype instead.}
 }
diff --git a/man/sim_all.Rd b/man/sim_all.Rd
index ce87f0682dd22fefdf21e0222e98ac2f4ea6c134..a7d5e46e96a14722eee1ddc922b612ffa9379bef 100644
--- a/man/sim_all.Rd
+++ b/man/sim_all.Rd
@@ -25,7 +25,7 @@ sim_all(
 
 \item{resps}{Number of respondents you want to simulate}
 
-\item{designtype}{Is it a design created with ngene or with spdesign. Ngene desings should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.}
+\item{designtype}{Is it a design created with ngene, spdesign or idefix. use 'ngene', 'spdesign' or 'idefix. Ngene designs should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. Idefix objects should also be stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.}
 
 \item{destype}{Deprecated. Use designtype instead.}
 
diff --git a/man/sim_choice.Rd b/man/sim_choice.Rd
index dce176ab7438b89747b203af3d368e1f73ec3a9f..e15264b1f598713b1077749d49643b339ffb185b 100644
--- a/man/sim_choice.Rd
+++ b/man/sim_choice.Rd
@@ -28,7 +28,7 @@ sim_choice(
 
 \item{ut}{The first element of the utility function list}
 
-\item{designtype}{Is it a design created with ngene or with spdesign. Ngene desings should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.}
+\item{designtype}{Is it a design created with ngene, spdesign or idefix. use 'ngene', 'spdesign' or 'idefix. Ngene designs should be stored as the standard .ngd output. spdesign should be the spdesign object stored as an RDS file. Idefix objects should also be stored as an RDS file. If designtype is not specified, I try to guess what it is. This is especially helpful if you want to carry out a simulation for both spdesign designs and ngene designs at the same time.}
 
 \item{destype}{Deprecated. Use designtype instead.}