jQuery UI bounce effect not working but shake does

Question

I have the jQuery shake effect working but for some reason when I switch the bounce effect, on mouseover of the element I want to affect, it moves but does not bounce.

<div class="thumb-shadow">
    <a href="services/solar">
         <img width="160" height="160" alt="" class="attachment-post-thumbnail wp-post-image" src="http://localhost:81/dcdccd/cms/wp-content/uploads/solar.jpg" style="">                           
    </a>
</div>

jQuery('.thumb-shadow img').mouseenter(function() {
    jQuery(this).effect("bounce", {times: 3}, 500);
});

Something I am overlooking?

Answer 1

From the jsfiddle provided by Spokey works.

My conclusion is, you're not including jQuery UI.

Try adding it.

<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>

From your comments,

Might missed to check it