How to get Multiselect product attribute values to display on frontend?

I’m trying to display values from Multiselect Product Attribute on frontend in my template file.

For a regular dropdown, I can get the values for the dropdowns but I’m not sure how to get values from Multiselect to display on frontend.

Here’s what I’m using for dropdowns in my template file:

<?php 
dropdown_id = $this->helper('Magento\Catalog\Helper\Output')->productAttribute($block->getProduct(), $block->getProduct()->getDropdown(), 'dropdown');
$dropdown_attr = $_product->getResource()->getAttribute('dropdown');
if ($dropdown_attr->usesSource()) {
    $dropdown = $dropdown_attr->getSource()->getOptionText($dropdown_id);
}
?>