diff --git a/src/func/instances/effect.rs b/src/func/instances/effect.rs
index 547309a..72a7dc5 100644
--- a/src/func/instances/effect.rs
+++ b/src/func/instances/effect.rs
@@ -15,7 +15,7 @@ pub trait Effect: Send {
     fn e_pure() -> Self;
 
     /// Used in [`ApplicativeLA2::la2`] and other [`Applicative`] methods.
-    fn e_seq(el: Self, er: Self) -> Self;
+    fn e_parallel(el: Self, er: Self) -> Self;
 
     /// Used in [`Monad::bind`] and other [`Monad`] methods.
     fn e_after(self, effect: Self) -> Self;
@@ -79,7 +79,7 @@ impl<'a, E: 'a + Effect> ApplicativeSeq<'a> for EffectInstance<E> {
     ) -> Self::F<B> {
         WithEffect {
             value: (ff.value)(fa.value),
-            effect: E::e_seq(ff.effect, fa.effect),
+            effect: E::e_parallel(ff.effect, fa.effect),
         }
     }
 }
@@ -92,7 +92,7 @@ impl<'a, E: 'a + Effect> ApplicativeLA2<'a> for EffectInstance<E> {
     ) -> Self::F<C> {
         WithEffect {
             value: f(fa.value, fb.value),
-            effect: E::e_seq(fa.effect, fb.effect),
+            effect: E::e_parallel(fa.effect, fb.effect),
         }
     }
 }
@@ -101,7 +101,7 @@ impl<'a, E: 'a + Effect> ApplicativeTuple<'a> for EffectInstance<E> {
     fn tuple<A: 'a + Send, B: 'a + Send>((fa, fb): (Self::F<A>, Self::F<B>)) -> Self::F<(A, B)> {
         WithEffect {
             value: (fa.value, fb.value),
-            effect: E::e_seq(fa.effect, fb.effect),
+            effect: E::e_parallel(fa.effect, fb.effect),
         }
     }
 }
@@ -113,7 +113,7 @@ impl<'a, E: 'a + Effect> Applicative<'a> for EffectInstance<E> {
         drop(fa.value);
         WithEffect {
             value: fb.value,
-            effect: E::e_seq(fa.effect, fb.effect),
+            effect: E::e_parallel(fa.effect, fb.effect),
         }
     }
 
@@ -121,7 +121,7 @@ impl<'a, E: 'a + Effect> Applicative<'a> for EffectInstance<E> {
         drop(fb.value);
         WithEffect {
             value: fa.value,
-            effect: E::e_seq(fa.effect, fb.effect),
+            effect: E::e_parallel(fa.effect, fb.effect),
         }
     }
 }
diff --git a/src/rstd/counting.rs b/src/rstd/counting.rs
index 6e83925..3a5ecb4 100644
--- a/src/rstd/counting.rs
+++ b/src/rstd/counting.rs
@@ -7,7 +7,7 @@ impl instances::effect::Effect for usize {
         0
     }
 
-    fn e_seq(el: Self, er: Self) -> Self {
+    fn e_parallel(el: Self, er: Self) -> Self {
         std::cmp::max(el, er)
     }
 
diff --git a/src/rstd/tracing.rs b/src/rstd/tracing.rs
index 9fc3f87..699e745 100644
--- a/src/rstd/tracing.rs
+++ b/src/rstd/tracing.rs
@@ -31,7 +31,7 @@ impl instances::effect::Effect for TraceBox {
         TraceBox::pure()
     }
 
-    fn e_seq(el: Self, er: Self) -> Self {
+    fn e_parallel(el: Self, er: Self) -> Self {
         TraceBox::parallel(el, er)
     }