diff --git a/pyrobolearn/actorcritics/actorcritic.py b/pyrobolearn/actorcritics/actorcritic.py
index 34a9426..3b0602c 100644
--- a/pyrobolearn/actorcritics/actorcritic.py
+++ b/pyrobolearn/actorcritics/actorcritic.py
@@ -99,17 +99,49 @@ class ActorCritic(object):
         """Compute the action."""
         return self.act(x)
 
-    def act(self, states=None, deterministic=True):
-        """Evaluate the given input states."""
-        return self.actor.act(states, deterministic=deterministic)
+    def act(self, state=None, deterministic=True, to_numpy=True, return_logits=False, apply_action=True):
+        """Evaluate the given input states.
 
-    def evaluate(self, states=None):
-        """Evaluate the given input states."""
-        return self.critic.compute(states)
+        Args:
+            state (State): current state
+            deterministic (bool): True by default. It can only be set to False, if the policy is stochastic.
+            to_numpy (bool): If True, it will convert the data (torch.Tensors) to numpy arrays.
+            return_logits (bool): If True, in the case of discrete outputs, it will return the logits.
+            apply_action (bool): If True, it will call and execute the action.
 
-    def act_and_evaluate(self, states=None):
-        """Act and evaluate the given input states."""
-        return self.act(states), self.evaluate(states)
+        Returns:
+            (list of) np.array / torch.Tensor: action data
+        """
+        return self.actor.act(state, deterministic=deterministic, to_numpy=to_numpy, return_logits=return_logits,
+                              apply_action=apply_action)
+
+    def evaluate(self, state=None, to_numpy=False):
+        """Evaluate the given input state.
+
+        Args:
+            state (None, State, (list of) np.array, (list of) torch.Tensor): state input data. If None, it will get
+                the data from the inputs that were given at the initialization.
+            to_numpy (bool): If True, it will convert the data (torch.Tensors) to numpy arrays.
+        """
+        return self.critic.evaluate(state, to_numpy=to_numpy)
+
+    def act_and_evaluate(self, state=None, deterministic=True, to_numpy=True, return_logits=False, apply_action=True):
+        """Act and evaluate the given input states.
+
+        Args:
+            state (State): current state
+            deterministic (bool): True by default. It can only be set to False, if the policy is stochastic.
+            to_numpy (bool): If True, it will convert the data (torch.Tensors) to numpy arrays.
+            return_logits (bool): If True, in the case of discrete outputs, it will return the logits.
+            apply_action (bool): If True, it will call and execute the action.
+
+        Returns:
+            (list of) np.array / torch.Tensor: action data
+        """
+        action = self.act(state, deterministic=deterministic, to_numpy=to_numpy, return_logits=return_logits,
+                          apply_action=apply_action)
+        value = self.evaluate(state, to_numpy=to_numpy)
+        return action, value
 
 
 class SharedActorCritic(object):
diff --git a/pyrobolearn/actorcritics/basic_actorcritic.py b/pyrobolearn/actorcritics/basic_actorcritic.py
index 4edd55a..07d567d 100644
--- a/pyrobolearn/actorcritics/basic_actorcritic.py
+++ b/pyrobolearn/actorcritics/basic_actorcritic.py
@@ -10,7 +10,7 @@ import itertools
 import torch
 
 from pyrobolearn.policies import LinearPolicy
-from pyrobolearn.values import LinearStateValue
+from pyrobolearn.values import LinearValue
 from pyrobolearn.actorcritics import ActorCritic, SharedActorCritic
 
 __author__ = "Brian Delhaisse"
@@ -42,7 +42,7 @@ class LinearActorCritic(ActorCritic):
             postprocessors (Processor, list of Processor, None): post-processors to be applied to the policy's output
         """
         policy = LinearPolicy(states, actions, rate=rate, preprocessors=preprocessors, postprocessors=postprocessors)
-        value = LinearStateValue(states, preprocessors=preprocessors)
+        value = LinearValue(states, preprocessors=preprocessors)
         super(LinearActorCritic, self).__init__(policy, value)
 
 
diff --git a/pyrobolearn/actorcritics/nn_actorcritic.py b/pyrobolearn/actorcritics/nn_actorcritic.py
index c92f9c0..61c6f4f 100644
--- a/pyrobolearn/actorcritics/nn_actorcritic.py
+++ b/pyrobolearn/actorcritics/nn_actorcritic.py
@@ -12,7 +12,7 @@ import itertools
 import torch
 
 from pyrobolearn.policies import MLPPolicy
-from pyrobolearn.values import MLPStateValue
+from pyrobolearn.values import MLPValue
 from pyrobolearn.actorcritics import ActorCritic, SharedActorCritic
 
 __author__ = "Brian Delhaisse"
@@ -51,12 +51,12 @@ class MLPActorCritic(ActorCritic):
             preprocessors (Processor, list of Processor, None): pre-processors to be applied to the given input
             postprocessors (Processor, list of Processor, None): post-processors to be applied to the policy's output
         """
-        policy = MLPPolicy(states, actions, hidden_units=hidden_units, activation_fct=activation_fct,
-                           last_activation_fct=last_activation_fct, dropout_prob=dropout_prob, rate=rate,
+        policy = MLPPolicy(states, actions, hidden_units=hidden_units, activation=activation_fct,
+                           last_activation=last_activation_fct, dropout=dropout_prob, rate=rate,
                            preprocessors=preprocessors, postprocessors=postprocessors)
-        value = MLPStateValue(states, hidden_units=hidden_units, activation_fct=activation_fct,
-                              last_activation_fct=last_activation_fct, dropout_prob=dropout_prob,
-                              preprocessors=preprocessors)
+        value = MLPValue(states, hidden_units=hidden_units, activation_fct=activation_fct,
+                         last_activation_fct=last_activation_fct, dropout_prob=dropout_prob,
+                         preprocessors=preprocessors)
         super(MLPActorCritic, self).__init__(policy, value)